Depot formulations

ABSTRACT

Pharmaceutical compositions comprising an active pharmaceutical ingredient, a high viscosity liquid carrier material, a hydrophobic solvent, and a hydrophilic solvent are disclosed. Also disclosed are methods of manufacturing and using the compositions. The compositions are suitable for use, e.g., as depot formulations.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation-in-part of U.S. application Ser. No. 15/637,401 filed on Jun. 29, 2017, which claims benefit of provisional applications 62/440,658 filed on Dec. 30, 2016 and 62/356,613 filed on Jun. 30, 2016; all of which are incorporated by reference herein in their entireties.

FIELD OF THE INVENTION

The present disclosure relates to pharmaceutical depot formulations and uses thereof, including ophthalmic pharmaceutical depot formulations.

BACKGROUND

Certain ophthalmic conditions, such as uveitis, wet and dry age-related macular degeneration (AMD), diabetic macular edema (DME), diabetic retinopathy (DR) and keratomycosis, require long-term treatment. While drug treatments can be given systemically (e.g., orally), such treatment exposes the entire body to the drug, and is not able to focus the treatment on the area in greatest need of treatment. An ophthalmic depot formulation should be able to concentrate treatment on the area in need of treatment, while reducing systemic exposure of patients' bodies to the medication, and reducing frequency of administration.

However, ophthalmic depot formulations are more challenging to develop than other implants and depot formulations. An ophthalmic depot must minimize, or preferably completely avoid, affecting vision, but the eye has limited space, and may be sensitive to pressure and/or distortion. Thus an ophthalmic depot formulation—whether, e.g., intra-humorous or subconjunctival—should be limited in physical size, i.e., volume. However, the depot formulation should at the same time contain enough active pharmaceutical ingredient (API) to avoid the need for frequent re-application (since application methods are typically invasive and inconvenient, e.g., by injection in a hospital or clinical setting).

With regard to intra-humorous (e.g., intra-vitreous) depots, because these are placed into fluid environments, it is also important for the depot to remain cohesive. A depot that is not cohesive can break up into many separate globules. These globules have a greater collective surface area than a cohesive depot, which can affect the rate of API release. A large number of globules also has the potential to adversely impact vision.

Implanted or injected formulations, such as ophthalmic (e.g., intra-vitreous) depots, are highly invasive, inconvenient, and may require administration by a healthcare professional. Therefore, it is usually considered advantageous for depot formulations to exhibit controlled or extended release after the pharmaceutical composition is administered to the patient, and which preferably exhibits continued drug efficacy over a long period.

There remains a long-felt need for improved depot formulations, including ophthalmic depot formulations and methods for treating ophthalmic conditions. For instance, there remains a long-felt need for sirolimus depot formulations and methods of use thereof for treating ophthalmic conditions. There remains a long-felt need for a depot formulation, including an ophthalmic depot formulation, capable of providing sustained release of an active ingredient. There remains a need for depot formulations, preferably ophthalmic depot formulations, which attain sustained release via a composition consisting essentially of an active pharmaceutical ingredient, a high viscosity liquid carrier material (HVLCM), a hydrophobic solvent; and a hydrophilic solvent, which composition preferably does not comprise other excipients materially affecting the rate or extent of the sustained release.

SUMMARY

Certain non-limiting aspects of the disclosure are provided below:

1. A composition comprising:

an active pharmaceutical ingredient;

a high viscosity liquid carrier material (HVLCM);

a first hydrophobic solvent; and

a hydrophilic solvent;

wherein the composition is a solution at 25° C. and 1 atmosphere and/or wherein the composition has a viscosity ranging from about 1 cP to about 150 cP at 25° C. and 1 atmosphere.

2. A composition comprising:

an active pharmaceutical ingredient;

a high viscosity liquid carrier material (HVLCM), wherein the HVLCM is present in an amount ranging from about 0.5 wt % to about 15 wt %, based on weight of the composition;

a first hydrophobic solvent, wherein the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 50 wt %, based on weight of the composition; and

a hydrophilic solvent;

wherein the composition is a solution at 25° C. and 1 atmosphere and/or wherein the composition has a viscosity ranging from about 1 cP to about 150 cP at 25° C. and 1 atmosphere.

3. A composition comprising:

an active pharmaceutical ingredient;

a high viscosity liquid carrier material (HVLCM), wherein the HVLCM is present in an amount ranging from about 0.5 wt % to about 15 wt %, based on weight of the composition;

a first hydrophobic solvent, wherein the first hydrophobic solvent is present in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition; and

a hydrophilic solvent;

wherein the composition is a solution at 25° C. and 1 atmosphere and/or wherein the composition has a viscosity ranging from about 1 cP to about 150 cP at 25° C. and 1 atmosphere.

4. A composition comprising:

an active pharmaceutical ingredient, wherein the active pharmaceutical ingredient comprises sirolimus;

a high viscosity liquid carrier material (HVLCM);

a first hydrophobic solvent; and

a hydrophilic solvent.

5. A composition comprising:

an active pharmaceutical ingredient, wherein the active pharmaceutical ingredient comprises sirolimus;

a high viscosity liquid carrier material (HVLCM), wherein the HVLCM is present in an amount ranging from about 0.5 wt % to about 15 wt %, based on weight of the composition;

a first hydrophobic solvent, wherein the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 50 wt %, based on weight of the composition; and

a hydrophilic solvent.

6. A composition comprising:

an active pharmaceutical ingredient, wherein the active pharmaceutical ingredient comprises sirolimus;

a high viscosity liquid carrier material (HVLCM), wherein the HVLCM is present in an amount ranging from about 0.5 wt % to about 15 wt %, based on weight of the composition;

a first hydrophobic solvent, wherein the first hydrophobic solvent is present in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition; and

a hydrophilic solvent.

7. A composition comprising:

an active pharmaceutical ingredient;

a first hydrophobic solvent;

a second hydrophobic solvent different from the first hydrophobic solvent, the second hydrophobic solvent comprising at least one of a trialkyl citrate and an acetyl trialkyl citrate, wherein alkyl groups of each of the trialkyl citrate and the acetyl trialkyl citrate are the same or different, and have a number of carbon atoms of 3 to 5; and a hydrophilic solvent.

8. A composition comprising:

an active pharmaceutical ingredient;

a polyalkylene glycol;

a first hydrophobic solvent; and

a hydrophilic solvent different from the polyalkylene glycol.

9. A composition comprising:

an active pharmaceutical ingredient, wherein the active pharmaceutical ingredient comprises sirolimus;

a polyalkylene glycol, wherein the polyalkylene glycol is present in an amount ranging from about 40 wt % to about 55 wt %;

a first hydrophobic solvent, wherein the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 50 wt %, based on weight of the composition; and

a hydrophilic solvent different from the polyalkylene glycol.

10. A composition comprising:

an active pharmaceutical ingredient;

a poloxamer;

a first hydrophobic solvent; and

a hydrophilic solvent.

11. A composition comprising:

an active pharmaceutical ingredient;

an antioxidant;

a first hydrophobic solvent; and

a hydrophilic solvent.

12. A composition comprising:

an active pharmaceutical ingredient;

an antioxidant;

a first hydrophobic solvent, wherein the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 50 wt %, based on weight of the composition; and

a hydrophilic solvent.

13. A composition comprising:

an active pharmaceutical ingredient;

an antioxidant;

a first hydrophobic solvent, wherein the first hydrophobic solvent is present in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition; and

a hydrophilic solvent.

14. The composition of any one of aspects 7 to 13, wherein the composition further comprises a high viscosity liquid carrier material (HVLCM).

15. The composition of any one of aspects 1, 4, and 14, wherein the HVLCM is present in an amount ranging from about 0.1 wt % to about 50 wt %, based on weight of the composition.

16. The composition of any one of aspects 1, 4, and 14, wherein the HVLCM is present in an amount ranging from about 0.5 wt % to about 50 wt %, based on weight of the composition.

17. The composition of any one of aspects 1, 4, and 14, wherein the HVLCM is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition.

18. The composition of aspect 15, wherein the HVLCM is present in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition.

19. The composition of aspect 15, wherein the HVLCM is present in an amount ranging from about 1 wt % to about 20 wt %, based on weight of the composition.

20. The composition of aspect 19, wherein the HVLCM is present in an amount ranging from about 5 wt % to about 15 wt %, based on weight of the composition.

21. The composition of aspect 15, wherein the HVLCM is present in an amount ranging from about 0.1 wt % to about 10 wt %, based on weight of the composition.

22. The composition of any one of aspects 1 to 6 and 14, wherein the HVLCM is present in an amount ranging from about 0.8 wt % to about 10 wt %, based on weight of the composition.

23. The composition of any one of aspects 1 to 6 and 14, wherein the HVLCM is present in an amount ranging from about 0.5 wt % to about 5 wt %, based on weight of the composition.

24. The composition of any one of aspects 1 to 6 and 14 to 23, wherein the HVLCM comprises sucrose acetate isobutyrate (SAIB).

25. The composition of any one of aspects 1 to 24, wherein the composition comprises from about 1 wt % to about 10 wt % of the active pharmaceutical ingredient, based on weight of the composition.

26. The composition of aspect 25, wherein the composition comprises from about 1 wt % to about 5 wt % of the active pharmaceutical ingredient, based on weight of the composition.

27. The composition of any one of aspects 1 to 26, wherein the active pharmaceutical ingredient comprises an antibiotic.

28. The composition of any one of aspects 1 to 3, 7, 8, and 10 to 27, wherein the active pharmaceutical ingredient comprises sirolimus.

29. The composition of any one of aspects 1 to 28, wherein the active pharmaceutical ingredient comprises a substance other than sirolimus.

30. The composition of any one of aspects 1 to 28, wherein the active pharmaceutical ingredient does not comprise an ophthalmic drug other than sirolimus.

31. The composition of any one of aspects 1 to 30, wherein the first hydrophobic solvent is present in an amount ranging from about 10 wt % to about 95 wt %, based on weight of the composition.

32. The composition of aspect 31, wherein the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition.

33. The composition of aspect 32, wherein the first hydrophobic solvent is present in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition.

34. The composition of any one of aspects 1 to 31, wherein the first hydrophobic solvent is present in an amount ranging from about 35 wt % to about 55 wt %, based on weight of the composition.

35. The composition of aspect 34, wherein the first hydrophobic solvent is present in an amount ranging from about 35 wt % to about 50 wt %, based on weight of the composition.

36. The composition of aspect 35, wherein the first hydrophobic solvent is present in an amount ranging from about 35 wt % to about 45 wt %, based on weight of the composition.

37. The composition of aspect 31, wherein the first hydrophobic solvent is present in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition.

38. The composition of any one of aspects 1 to 37 wherein the first hydrophobic solvent comprises at least one of methyl benzoate, ethyl benzoate, n-propyl benzoate, isopropyl benzoate, butyl benzoate, isobutyl benzoate, sec-butyl benzoate, tert-butyl benzoate, isoamyl benzoate, and benzyl benzoate. 39. The composition of any one of aspects 1 to 38, wherein the first hydrophobic solvent comprises benzyl benzoate. 40. The composition of any one of aspects 1 to 39, wherein the first hydrophobic solvent does not comprise 1,1,1,2 tetrafluoroethane. 41. The composition of any one of aspects 1 to 39, wherein the first hydrophobic solvent does not comprise a fluorinated hydrocarbon. 42. The composition of any one of aspects 1 to 39, wherein the first hydrophobic solvent does not comprise a propellant. 43. The composition of any one of aspects 1 to 42, wherein the hydrophilic solvent is present in an amount ranging from about 1 wt % to about 70 wt %, based on weight of the composition. 44. The composition of any one of aspects 1 to 42, wherein the hydrophilic solvent is present in an amount ranging from about 2 wt % to about 60 wt %, based on weight of the composition. 45. The composition of aspect 43, wherein the hydrophilic solvent is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition. 46. The composition of any one of aspects 1 to 45, wherein the hydrophilic solvent is present in an amount less than 10 wt %, based on weight of the composition. 47. The composition of aspect 46, wherein the hydrophilic solvent is present in an amount ranging from about 1 wt % to about 7 wt %, based on weight of the composition. 48. The composition of any one of aspects 1 to 47, wherein the hydrophilic solvent is present in an amount less than 5 wt %, based on weight of the composition. 49. The composition of any one of aspects 1 to 48, wherein the hydrophilic solvent comprises at least one of ethanol, triethyl acetyl citrate (ATEC), dimethylsulfoxide (DMSO), N-methylpyrrolidone (NMP), propylene glycol, dimethyl acetamide (DMA), and polyethylene glycol (PEG). 50. The composition of any one of aspects 1 to 49, wherein the hydrophilic solvent comprises ethanol. 51. The composition of any one of aspects 1 to 49, wherein the hydrophilic solvent comprises ATEC. 52. The composition of any one of aspects 1 to 51, wherein the hydrophilic solvent comprises at least ethanol and ATEC. 53. The composition of any one of aspects 1 to 52, wherein the hydrophilic solvent comprises PEG. 54. The composition of any one of aspects 1 to 7 and 10 to 49, wherein the hydrophilic solvent comprises at least ethanol and PEG. 55. The composition of any one of aspects 1 to 7 and 10 to 54, wherein the hydrophilic solvent is present in an amount ranging from about 3 wt % to about 55 wt %, based on weight of the composition. 56. The composition of any one of aspects 50, 52, 54, and 55, wherein the ethanol is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition. 57. The composition of any one of aspects 50, 52, 54 and 56, wherein the ethanol is present in an amount ranging from about 3 wt % to about 10 wt %, based on weight of the composition. 58. The composition of any one of aspects 53 to 57, wherein the PEG is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition. 59. The composition of aspect 58, wherein the PEG is present in an amount ranging from about 35 wt % to about 50 wt %, based on weight of the composition. 60. The composition of aspect 58, wherein the PEG is present in an amount ranging from about 40 wt % to about 55 wt %, based on weight of the composition. 61. The composition of aspect 59, wherein the PEG is present in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition. 62. The composition of any one of aspects 1 to 6 and 8 to 61, further comprising a trialkyl citrate and/or acetyl trialkyl citrate, wherein alkyl groups of each of the trialkyl citrate and the acetyl trialkyl citrate are the same or different, and have a number of carbon atoms of 3 to 5. 63. The composition of aspect 7 or 62, wherein the trialkyl citrate and/or acetyl trialkyl citrate is present in an amount ranging from about 10 wt % to about 95 wt %, based on weight of the composition. 64. The composition of aspect 7 or 62, wherein the trialkyl citrate and/or acetyl trialkyl citrate is present in an amount ranging from about 35 wt % to about 65 wt %, based on weight of the composition. 65. The composition of aspect 7 or 62, wherein the trialkyl citrate and/or acetyl trialkyl citrate is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition. 66. The composition of aspect 65, wherein the trialkyl citrate and/or acetyl trialkyl citrate is present in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition. 67. The composition of any one of aspects 7 and 62 to 66, wherein the number of carbon atoms of the alkyl group of the trialkyl citrate and/or acetyl trialkyl citrate is 4. 68. The composition of any one of aspects 7 and 62 to 67, wherein the trialkyl citrate is tri-n-butyl citrate, and the acetyl trialkyl citrate is acetyl tri-n-butyl citrate. 69. The composition of any one of aspects 7 and 62 to 67, wherein the trialkyl citrate and/or acetyl trialkyl citrate comprises acetyl tri-n-butyl citrate. 70. The composition of any one of aspects 1 to 69, wherein the composition comprises water. 71. The composition of any one of aspects 1 to 70, wherein the composition comprises less than 1 wt % of water. 72. The composition of any one of aspects 1 to 70, wherein the composition comprises less than 0.5 wt % of water. 73. The composition of any one of aspects 1 to 7 and 11 to 52, 55 to 57, and 62 to 72, wherein the composition is polymer-free apart from the active pharmaceutical ingredient which optionally comprises a polymer. 74. The composition of any one of aspects 1 to 72, wherein the composition includes at least one of polyalkylene glycol and poloxamer, and wherein the composition is otherwise polymer-free apart from the active pharmaceutical ingredient which optionally comprises a polymer. 75. The composition of any one of aspects 1 to 72, further comprising a polymer. 76. The composition of aspect 75, wherein the polymer is present in an amount ranging from about 0.1 wt % to about 30 wt %, based on weight of the composition. 77. The composition of aspect 75 or 76, wherein the polymer comprises a polyester. 78. The composition of any one of aspects 75 to 77, wherein the polymer comprises at least one of poly(lactic acid)(glycolic acid), poly(lactic acid), and polycaprolactone. 79. The composition of any one of aspects 1 to 78, further comprising a surfactant. 80. The composition of any one of aspects 1 to 78, further comprising at least one member selected from poloxamer, polyethoxylated castor oil, polyoxyethylated hydroxystearic acid, sorbitan monooleate, and sorbitan monolaurate. 81. The composition of aspect 80, wherein the at least one member is present in an amount ranging from about 0.1 wt % to about 10 wt %, based on weight of the composition. 82. The composition of any one of aspects 1 to 81, further comprising triethyl citrate. 83. The composition of any one of aspects 1 to 82, further comprising ascorbyl palmitate. 84. The composition of any one of aspects 1 to 9, 11 to 72, and 75 to 83, further comprising poloxamer. 85. The composition of aspect 10 or 84, wherein the poloxamer is present in an amount ranging from about 0.5 wt % to about 10 wt %. 86. The composition of aspect 10 or 84, wherein the poloxamer is present in an amount ranging from about 0.5 wt % to about 2 wt %. 87. The composition of aspect 10 or 84, wherein the poloxamer is present in an amount ranging from about 0.1 wt % to about 5 wt %. 88. The composition of any one of aspects 1 to 87, further comprising an acid precursor. 89. The composition of any one of aspects 1 to 88, wherein at least 98% of the active pharmaceutical ingredient in the composition remains after storage in a 2 mL crimp sealed glass vial for 18 weeks at 5° C./60% RH. 90. The composition of any one of aspects 1 to 89, wherein at least 90% of the active pharmaceutical ingredient in the composition remains after storage in a 2 mL crimp sealed glass vial for 18 weeks at 25° C./60% RH. 91. The composition of any one of aspects 1 to 10 and 14 to 90, wherein the composition further comprises an antioxidant. 92. The composition of any one of aspects 11 to 13 and 91, wherein the antioxidant is present in an amount ranging from about 0.5 wt % to about 5 wt %, based on weight of the composition. 93. The composition of any one of aspects 11 to 13, 91 and 92, wherein the antioxidant comprises vitamin E. 94. The composition of aspect 93, wherein the vitamin E is present in an amount ranging from about 1 wt % to about 50 wt %, based on weight of the composition. 95. The composition of any one of aspects 93 and 94, wherein the vitamin E is present in an amount less than 10 wt %, based on weight of the composition. 96. The composition of aspect 95, wherein the vitamin E is present in an amount ranging from about 0.1 wt % to about 5 wt %, based on weight of the composition. 97. The composition of any one of aspects 11 to 13 and 93 to 96, wherein the vitamin E is present in an amount of less than 5 wt %, based on weight of the composition. 98. The composition of aspect 97, wherein the vitamin E is present in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition. 99. The composition of aspect 93, wherein a weight ratio of HVLCM to vitamin E ranges from about 60:1 to about 1:2. 100. The composition of aspect 93, wherein a weight ratio of HVLCM to vitamin E ranges from about 10:1 to about 1:1.8. 101. The composition of aspect 93, wherein a weight ratio of HVLCM to vitamin E ranges from about 5:1 to about 1:1.5. 102. The composition of aspect 93, wherein a weight ratio of HVLCM to vitamin E ranges from about 2:1 to about 1:1.5. 103. The composition of aspect 99, wherein the HVLCM comprises SAIB. 104. The composition of aspect 100, wherein the HVLCM comprises SAIB. 105. The composition of aspect 101, wherein the HVLCM comprises SAIB. 106. The composition of aspect 102, wherein the HVLCM comprises SAIB. 107. The composition of aspect 93, wherein the composition comprises SAIB, and the composition has a weight ratio of SAIB:vitamin E ranging from about 0.5 to about 10. 108. The composition of any one of aspects 93 to 107, wherein the weight ratio of HVLCM to vitamin E is such that the density, at 25° C. and 1 atm, of a mixture consisting of said HVLCM and said vitamin E in said weight ratio is at least 1 g/mL. 109. The composition of aspect 108, wherein said density is at least 1.05 g/mL. 110. The composition of any one of aspects 1 to 109, wherein the composition further comprises a lipidic ester. 111. The composition of any one of aspects 1 to 110, wherein the composition further comprises a fatty ester. 112. The composition of any one of aspects 1 to 111, wherein the composition further comprises at least one of lauryl lactate and lauryl glycol. 113. The composition of any one of aspects 1 to 112, wherein the composition has a density at 25° C. and 1 atmosphere ranging from 1.02 g/mL to 1.15 g/mL. 114. The composition of any one of aspects 1 to 113, wherein the composition has a viscosity ranging from about 1 cP to about 150 cP at 25° C. and 1 atmosphere. 115. The composition of any one of aspects 1 to 113, wherein the composition has a viscosity ranging from about 5 cP to about 50 cP at 25° C. and 1 atmosphere. 116. The composition of any one of aspects 1 to 113, wherein the composition has a viscosity ranging from about 10 cP to about 30 cP at 25° C. and 1 atmosphere. 117. The composition of any one of aspects 1 to 116, wherein the composition is other than an emulsion. 118. The composition of any one of aspects 1 to 117, wherein the % cumulative release of the active pharmaceutical ingredient from the composition is less than 50% at T=24 hr when assayed by injecting 100 μL of the composition in 5 mL of release medium consisting of phosphate buffered saline with 0.1 wt % sodium dodecyl sulfate to form a sample, and placing the sample on an orbital shaker rotating at 30 rpm at 37° C. 119. The composition of any one of aspects 1 to 118, wherein the active pharmaceutical ingredient comprises sirolimus, and wherein the hydrophilic solvent comprises ethanol. 120. The composition of aspect 119, wherein the HVLCM comprises sucrose acetate isobutyrate. 121. The composition of aspect 119 or 120, wherein the first hydrophobic solvent comprises benzyl benzoate. 122. The composition of any one of aspects 119 to 121, comprising vitamin E. 123. The composition of any one of aspects 119 to 122, comprising acetyl tri-n-butyl citrate. 124. The composition of aspect 4, wherein the active pharmaceutical ingredient is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the HVLCM is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition;

the HVLCM comprises SAIB;

the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate;

the hydrophilic solvent is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol;

the composition further comprises vitamin E; and

the vitamin E is present in an amount ranging from about 0.1 wt % to about 5 wt %, based on weight of the composition.

125. The composition of aspect 124, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

126. The composition of aspect 125, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from 7 wt % to about 15 wt %, based on weight of the composition.

127. The composition of any one of aspects 124 to 126, further comprising poloxamer, wherein the poloxamer is present in an amount ranging from about 0.1 wt % to about 5 wt %, based on weight of the composition.

128. The composition of aspect 4, wherein the active pharmaceutical ingredient is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the HVLCM is present in an amount ranging from about 1 wt % to about 20 wt %, based on weight of the composition;

the HVLCM comprises SAIB;

the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate;

the hydrophilic solvent comprises at least ethanol and PEG;

the ethanol is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the PEG is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition;

the composition further comprises vitamin E; and

the vitamin E is present in an amount ranging from about 0.1 wt % to about 5 wt %, based on weight of the composition.

129. The composition of aspect 128, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

130. The composition of aspect 129, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from about 0.25 wt % to about 5 wt %, based on weight of the composition.

131. The composition of aspect 4, wherein the active pharmaceutical ingredient is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the HVLCM is present in an amount ranging from about 0.1 wt % to about 10 wt %, based on weight of the composition;

the HVLCM comprises SAIB;

the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate;

the hydrophilic solvent comprises at least ethanol and PEG;

the ethanol is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the PEG is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition;

the composition further comprises vitamin E; and

the vitamin E is present in an amount ranging from about 0.1 wt % to about 5 wt %, based on weight of the composition.

132. The composition of any one of aspects 1 to 131, wherein:

the active pharmaceutical ingredient comprises sirolimus in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition;

the HVLCM comprises sucrose acetate isobutyrate (SAIB) in an amount ranging from about 0.1 wt % to about 10 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate in an amount ranging from about 30 wt % to about 45 wt %, based on weight of the composition;

the hydrophilic solvent comprises (i) ethanol in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition; and (ii) PEG in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition; and

the composition further comprises vitamin E in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition.

133. The composition of any one of aspects 1 to 132, the composition consisting essentially of:

sirolimus in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition;

SAIB in an amount ranging from about 0.1 wt % to about 10 wt %, based on weight of the composition;

benzyl benzoate in an amount ranging from about 30 wt % to about 45 wt %, based on weight of the composition;

ethanol in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

PEG400 in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition; and

vitamin E in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition.

134. The composition of any one of aspects 1 to 133, the composition consisting essentially of:

sirolimus in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition;

SAIB in an amount not exceeding about 10 wt %, based on weight of the composition; benzyl benzoate;

the hydrophilic solvent selected from the group consisting of ethanol and PEG400; and

vitamin E in an amount ranging from about 0.5 wt % to about 2 wt %, wherein a weight ratio of SAIB to vitamin E exceeds about 0.5.

135. The composition of any one of aspects 131 to 134, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

136. The composition of aspect 135, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from about 0.025 wt % to about 2.5 wt %, based on weight of the composition.

137. The composition of aspect 4, wherein the active pharmaceutical ingredient is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the HVLCM is present in an amount ranging from about 0.1 wt % to about 10 wt %, based on weight of the composition;

the HVLCM comprises SAIB;

the first hydrophobic solvent is present in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate;

the hydrophilic solvent comprises at least ethanol;

the ethanol is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the composition further comprises vitamin E; and

the vitamin E is present in an amount ranging from about 0.1 wt % to about 5 wt %, based on weight of the composition.

138. The composition of aspect 137, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

139. The composition of aspect 138, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from about 0.025 wt % to about 2.5 wt %, based on weight of the composition.

140. The composition of aspect 7, wherein the active pharmaceutical ingredient is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the active pharmaceutical ingredient comprises sirolimus;

the composition further comprising a high viscosity liquid carrier material (HVLCM) present in an amount ranging from about 0.1 wt % to about 10 wt %, based on weight of the composition;

the HVLCM comprises SAIB;

the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate;

the second hydrophobic solvent is present in an amount ranging from about 30 wt % to about 60 wt %, based on weight of the composition;

the second hydrophobic solvent comprises acetyl tri-n-butyl citrate (ATBC);

the hydrophilic solvent is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol;

the composition further comprises vitamin E; and

the vitamin E is present in an amount ranging from about 0.1 wt % to about 5 wt %, based on weight of the composition.

141. The composition of aspect 140, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

142. The composition of aspect 141, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from about 0.025 wt % to about 2.5 wt %, based on weight of the composition.

143. The composition of aspect 4, wherein the active pharmaceutical ingredient is present in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition;

the HVLCM is present in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition;

the HVLCM comprises SAIB;

the first hydrophobic solvent is present in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate;

the hydrophilic solvent is present in an amount ranging from about 1 wt % to about 7 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol;

the composition further comprises vitamin E; and

the vitamin E is present in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition.

144. The composition of aspect 143, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

145. The composition of aspect 144, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from about 10 wt % to about 13 wt %, based on weight of the composition.

146. The composition of aspect 143, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the amount of the HVLCM present therein is about 47.5 wt %, based on weight of the composition;

the amount of the first hydrophobic solvent present therein is about 43.7 wt %, based on weight of the composition;

the amount of the ethanol present therein is about 4.8 wt %, based on weight of the composition; and

the amount of the vitamin E present therein is about 1 wt %, based on weight of the composition.

147. The composition of aspect 146, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

148. The composition of aspect 147, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount of about 12 wt %, based on weight of the composition.

149. The composition of aspect 4, wherein the active pharmaceutical ingredient is present in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition;

the HVLCM is present in an amount ranging from about 5 wt % to about 15 wt %, based on weight of the composition;

the HVLCM comprises SAIB;

the first hydrophobic solvent is present in an amount ranging from about 35 wt % to about 45 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate;

the hydrophilic solvent comprises at least ethanol and PEG;

the ethanol is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the PEG is present in an amount ranging from about 35 wt % to about 50 wt %, based on weight of the composition;

the composition further comprises vitamin E; and

the vitamin E is present in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition.

150. The composition of aspect 149, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

151. The composition of aspect 150, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from about 1 wt % to about 4 wt %, based on weight of the composition.

152. The composition of aspect 149, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the amount of the HVLCM present therein is about 9.7 wt %, based on weight of the composition;

the amount of the first hydrophobic solvent present therein is about 38.8 wt %, based on weight of the composition;

the amount of the ethanol present therein is about 4.8 wt %, based on weight of the composition;

the amount of the PEG present therein is about 42.7 wt %, based on weight of the composition; and

the amount of the vitamin E therein is about 1 wt %, based on weight of the composition.

153. The composition of aspect 152, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

154. The composition of aspect 153, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount of about 2.5 wt %, based on weight of the composition.

155. The composition of aspect 4, wherein the active pharmaceutical ingredient is present in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition;

the HVLCM is present in an amount ranging from about 0.5 wt % to about 5 wt %, based on weight of the composition;

the HVLCM comprises SAIB;

the first hydrophobic solvent is present in an amount ranging from about 35 wt % to about 50 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate;

the hydrophilic solvent comprises at least ethanol and PEG;

the ethanol is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the PEG is present in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition;

the composition further comprises vitamin E; and

the vitamin E is present in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition.

156. The composition of aspect 155, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

157. The composition of aspect 156, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from about 0.1 wt % to about 1 wt %, based on weight of the composition.

158. The composition of aspect 155, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the amount of the HVLCM present therein is about 1 wt %, based on weight of the composition;

the amount of the first hydrophobic solvent present therein is about 43.7 wt %, based on weight of the composition;

the amount of the ethanol present therein is about 4.8 wt %, based on weight of the composition;

the amount of the PEG present therein is about 46.5 wt %, based on weight of the composition; and

the amount of the vitamin E therein is about 1 wt %, based on weight of the composition.

159. The composition of aspect 158, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

160. The composition of aspect 159, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount of about 0.25 wt %, based on weight of the composition.

161. The composition of aspect 4, wherein the active pharmaceutical ingredient is present in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition;

the HVLCM is present in an amount ranging from about 0.5 wt % to about 5 wt %, based on weight of the composition;

the HVLCM comprises SAIB;

the first hydrophobic solvent is present in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate;

the hydrophilic solvent comprises at least ethanol;

the ethanol is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the composition further comprises vitamin E; and

the vitamin E is present in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition.

162. The composition of aspect 161, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

163. The composition of aspect 162, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from about 0.1 wt % to about 1 wt %, based on weight of the composition.

164. The composition of aspect 7, wherein the active pharmaceutical ingredient is present in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition;

the composition further comprising a high viscosity liquid carrier material (HVLCM) present in an amount ranging from about 0.5 wt % to about 5 wt %, based on weight of the composition;

the HVLCM comprises SAIB;

the first hydrophobic solvent is present in an amount ranging from about 35 wt % to about 50 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate;

the second hydrophobic solvent is present in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition;

the second hydrophobic solvent comprises acetyl tri-n-butyl citrate (ATBC);

the hydrophilic solvent comprises ethanol;

the ethanol is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition;

the composition further comprises vitamin E; and

the vitamin E is present in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition.

165. The composition of aspect 164, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

166. The composition of aspect 165, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from about 0.1 wt % to about 1 wt %, based on weight of the composition.

167. The composition of aspect 164, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the amount of the HVLCM present therein is about 1 wt %, based on weight of the composition;

the amount of the first hydrophobic solvent present therein is about 43.7 wt %, based on weight of the composition;

the amount of the second hydrophilic solvent present therein is about 46.5 wt %, based on weight of the composition;

the amount of the ethanol present therein is about 4.8 wt %, based on weight of the composition; and

the amount of the vitamin E therein is about 1 wt %, based on weight of the composition.

168. The composition of aspect 167, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

169. The composition of aspect 168, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount of about 0.25 wt %, based on weight of the composition.

170. The composition of any one of aspects 1 to 169, wherein:

the active pharmaceutical ingredient comprises sirolimus in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition;

the HVLCM comprises sucrose acetate isobutyrate (SAIB) in an amount ranging from about 0.1 wt % to about 10 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition; and

the composition further comprises vitamin E in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition.

171. The composition of any one of aspects 1 to 170, the composition consisting essentially of:

sirolimus in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition;

SAIB in an amount ranging from about 0.1 wt % to about 10 wt %, based on weight of the composition;

benzyl benzoate in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition;

ethanol in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition; and

vitamin E in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition.

172. The composition of aspect 170 or 171, wherein the SAIB comprises sucrose esterified with two acetic acid and six isobutyric acid moieties.

173. The composition of aspect 172, wherein the sucrose esterified with two acetic acid and six isobutyric acid moieties is present in an amount ranging from about 0.025 wt % to about 1 wt %, based on weight of the composition.

174. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 2 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 42.7 wt %, based on weight of the composition;

the hydrophilic solvent comprises PEG present at about 46.5 wt %, based on weight of the composition;

the hydrophilic solvent further comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

175. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 3 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 41.7 wt %, based on weight of the composition;

the hydrophilic solvent comprises PEG present at about 46.5 wt %, based on weight of the composition;

the hydrophilic solvent further comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

176. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 4 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 40.7 wt %, based on weight of the composition;

the hydrophilic solvent comprises PEG present at about 46.5 wt %, based on weight of the composition;

the hydrophilic solvent further comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

177. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 4.9 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 39.8 wt %, based on weight of the composition;

the hydrophilic solvent comprises PEG present at about 46.5 wt %, based on weight of the composition;

the hydrophilic solvent further comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

178. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 5.9 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 38.8 wt %, based on weight of the composition;

the hydrophilic solvent comprises PEG present at about 46.5 wt %, based on weight of the composition;

the hydrophilic solvent further comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

179. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 6.8 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 37.9 wt %, based on weight of the composition;

the hydrophilic solvent comprises PEG present at about 46.5 wt %, based on weight of the composition;

the hydrophilic solvent further comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

180. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 7.8 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 36.9 wt %, based on weight of the composition;

the hydrophilic solvent comprises PEG present at about 46.5 wt %, based on weight of the composition;

the hydrophilic solvent further comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

181. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 8.8 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 35.9 wt %, based on weight of the composition;

the hydrophilic solvent comprises PEG present at about 46.5 wt %, based on weight of the composition;

the hydrophilic solvent further comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

182. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 9.7 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 35 wt %, based on weight of the composition;

the hydrophilic solvent comprises PEG present at about 46.5 wt %, based on weight of the composition;

the hydrophilic solvent further comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

183. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 1 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 90.2 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

184. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 2 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 89.2 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

185. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 2.9 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 88.3 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

186. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 3.9 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 87.3 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

187. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 4.9 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 86.3 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

188. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 5.8 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 85.4 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

189. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 6.8 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 84.4 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

190. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 7.8 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 83.4 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

191. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 8.7 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 82.5 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

192. The composition of aspect 4, wherein the amount of the active pharmaceutical ingredient present therein is about 3 wt %, based on weight of the composition;

the HVLCM comprises SAIB present at about 9.7 wt %, based on weight of the composition;

the first hydrophobic solvent comprises benzyl benzoate present at about 81.5 wt %, based on weight of the composition;

the hydrophilic solvent comprises ethanol present at about 4.8 wt %, based on weight of the composition; and

the composition further comprising vitamin E present at about 1 wt %, based on weight of the composition.

193. A composition comprising:

an active pharmaceutical ingredient, wherein the active pharmaceutical ingredient comprises sirolimus;

means for extending a release profile of the pharmaceutical active ingredient when the composition is administered to a patient in need thereof.

194. The composition of any one of aspects 1 to 193, wherein when the composition is administered as a single dose intra-ocularly to a rabbit, the composition provides a median release profile of pharmaceutically active ingredient within ±20% of the release profile of C908 of FIG. 13. 195. The composition of aspect 194, wherein the single dose comprises 30 μL. 196. The composition of any of aspects 194 or 195, wherein the active pharmaceutical ingredient comprises 0.9 mg sirolimus. 197. The composition of any one of aspects 1 to 196, wherein when the composition is administered intra-ocularly as a single dose to a rabbit, a median amount of pharmaceutical active ingredient released from the composition at 1 month after administration ranges from 1% to 20% or 2% to 15% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 198. The composition of any one of aspects 1 to 197, wherein when the composition is administered intra-ocularly as a single dose to a rabbit, a median amount of pharmaceutical active ingredient released from the composition at 3 months after administration ranges from 10% to 60% or 20% to 50% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 199. The composition of any one of aspects 1 to 198, wherein when the composition is administered intra-ocularly as a single dose to a rabbit, a median amount of pharmaceutical active ingredient released from the composition at 6 months after administration ranges from 30% to 100% or 40% to 90% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 200. The composition of any one of aspects 1 to 199, wherein when the composition is placed in phosphate buffered saline with 0.1% (w/v) sodium dodecyl sulfate at 37° C., an amount of pharmaceutical active ingredient released from the composition at 1 day of placement in the phosphate buffered saline ranges from 5% to 50% or 10% to 40% of a total amount of the pharmaceutical active ingredient in the composition. 201. The composition of aspect 200, wherein the placed composition comprises 75 μL. 202. The composition of any of aspects 200 or 201, wherein the active pharmaceutical ingredient comprises 3 wt %, based on weight of the composition. 203. The composition of any one of aspects 1 to 202, wherein when the composition is placed in phosphate buffered saline with 0.1% (w/v) SDS at 37° C., an amount of pharmaceutical active ingredient released from the composition at 5 days of placement in the phosphate buffered saline ranges from 5% to 75% or 10% to 50% of a total amount of the pharmaceutical active ingredient in the composition. 204. The composition of any one of aspects 1 to 203, wherein when the composition is placed in phosphate buffered saline with 0.1% (w/v) SDS at 37° C., an amount of pharmaceutical active ingredient released from the composition at 10 days of placement in the phosphate buffered saline ranges from 5% to 85% or 15% to 60% of a total amount of the pharmaceutical active ingredient in the composition. 205. The composition of any one of aspects 1 to 204, containing the components in a ratio sufficient to maintain a therapeutically effective concentration of the active pharmaceutical ingredient for a period of at least 3 months when the composition is administered intra-ocularly as a single dose to a human patient. 206. The composition of any one of aspects 1 to 205, containing the components in a ratio sufficient to maintain a therapeutically effective retina-choroid concentration of the active pharmaceutical ingredient for a period of at least 3 months when the composition is administered intra-ocularly as a single dose to a human patient. 207. The composition of any one of aspects 1 to 206, the composition comprising SAIB and vitamin E, the composition having a weight ratio of SAIB:vitamin E ranging from about 0.5 to about 20. 208. The composition of any one of aspects 1 to 207, wherein the composition is pharmaceutically acceptable. 209. The composition of any one of aspects 1 to 208, wherein the composition is formulated for injection. 210. The composition of any one of aspects 1 to 209, which comprises

sirolimus in an amount of about 3 wt %, based on weight of the composition

SAIB in an amount of about 1 wt %, based on weight of the composition;

benzyl benzoate in an amount of about 43.7 wt %, based on weight of the composition;

ethanol in an amount of about 4.8 wt %, based on weight of the composition;

PEG400 present in an amount of about 46.5 wt %, based on weight of the composition; and

vitamin E in an amount of about 1 wt %, based on weight of the composition.

211. A method of treating a subject afflicted with an eye condition, the method comprising:

administering a composition to an eye of a subject in need thereof, wherein the composition comprises an effective amount of an active pharmaceutical ingredient capable of treating the eye condition, the composition comprising:

-   -   an active pharmaceutical ingredient;     -   a high viscosity liquid carrier material (HVLCM);     -   a first hydrophobic solvent; and     -   a hydrophilic solvent.         212. A method of treating a subject afflicted with an eye         condition, the method comprising:

administering a composition to an eye of a subject in need thereof, wherein the composition comprises an effective amount of an active pharmaceutical ingredient capable of treating the eye condition, the composition comprising:

-   -   an active pharmaceutical ingredient;     -   a high viscosity liquid carrier material (HVLCM), wherein the         HVLCM is present in an amount ranging from about 0.5 wt % to         about 15 wt %, based on weight of the composition;     -   a first hydrophobic solvent, wherein the first hydrophobic         solvent is present in an amount ranging from about 30 wt % to         about 50 wt %, based on weight of the composition; and     -   a hydrophilic solvent.         213. A method of treating a subject afflicted with an eye         condition, the method comprising:

administering a composition to an eye of a subject in need thereof, wherein the composition comprises an effective amount of an active pharmaceutical ingredient capable of treating the eye condition, the composition comprising:

-   -   an active pharmaceutical ingredient;     -   a high viscosity liquid carrier material (HVLCM), wherein the         HVLCM is present in an amount ranging from about 0.5 wt % to         about 15 wt %, based on weight of the composition;     -   a first hydrophobic solvent, wherein the first hydrophobic         solvent is present in an amount ranging from about 80 wt % to         about 95 wt %, based on weight of the composition; and     -   a hydrophilic solvent.         214. A method of treating a subject afflicted with an eye         condition, the method comprising:

administering the composition of any one of aspects 1 to 210 to an eye of a subject in need thereof, wherein the composition comprises an effective amount of an active pharmaceutical ingredient capable of treating the eye condition.

215. The method of any one of aspects 211 to 214, wherein the eye condition comprises uveitis, diabetic macular edema, or wet age-related macular degeneration.

216. The method of any one of aspects 211 to 214, wherein the eye condition comprises uveitis or wet age-related macular degeneration.

217. The method of any one of aspects 211 to 216, wherein the administering comprises injecting.

218. The method of aspect 217, wherein up to 50 μl of the composition is injected.

219. The method of aspect 217, wherein about 20 μl to about 30 μl of the composition is injected.

220. The method of any one of aspects 211 to 219, wherein the composition is injected with a needle having a size ranging from 27 G to 30 G.

221. The method of any one of aspects 211 to 220, wherein the composition is injected with a needle having a length ranging from about 1 cm to about 3 cm.

222. The method of any one of aspects 211 to 221, wherein at least 20% of the total amount of active pharmaceutical ingredient administered remains in the vitreous of the subject three months after the composition is injected into the vitreous of the subject. 223. A method of treating a subject afflicted with an eye condition, the method comprising:

administering the composition of any one of aspects 1 to 210 to the vitreous of a subject in need thereof, wherein the composition comprises an effective amount of an active pharmaceutical ingredient capable of treating the eye condition.

224. A method comprising:

administering to a patient a composition as defined in any one of aspects 1 to 210,

wherein the composition provides a median release profile of pharmaceutically active ingredient within ±20% of the release profile of C908 of FIG. 13.

225. The method of aspect 224, which is a method as defined in any one of aspects 211 to 223.

226. The method of any one of aspects 211 to 225, wherein the composition is administered intra-ocularly as a single dose to a human patient and a median amount of pharmaceutical active ingredient released from the composition at 1 month after administration ranges from 1% to 20% or 2% to 15% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 227. The method of any one of aspects 211 to 226, wherein the composition is administered intra-ocularly as a single dose to a human patient and a median amount of pharmaceutical active ingredient released from the composition at 3 months after administration to a human patient ranges from 10% to 60% or 20% to 50% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 228. The method of any one of aspects 211 to 227, wherein the composition is administered intra-ocularly as a single dose to a human patient and a median amount of pharmaceutical active ingredient released from the composition at 6 months after administration ranges from 30% to 100% or 40% to 90% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 229. The method of any one of aspects 211 to 228, wherein the composition comprises from 0.1 mg to 500 mg of the pharmaceutical active ingredient. 230. The method of any one of aspects 211 to 229, wherein a plasma Cmax of the pharmaceutical active ingredient ranges from 1 ng/mL to 10 ng/mL. 231. The method of any one of aspects 211 to 230, wherein a plasma Cmax of the pharmaceutical active ingredient is less than 10 ng/mL. 232. A composition as defined in any one of aspects 1 to 210 for use as a medicament. 233. A composition as defined in any one of aspects 1 to 210 for use in treatment of an eye condition, wherein the active pharmaceutical ingredient comprises an ophthalmic drug. 234. A composition for use of aspect 233, wherein the eye condition comprises uveitis, diabetic macular edema, or wet age-related macular degeneration. 235. A composition for use of aspect 233, wherein the eye condition comprises uveitis or wet age-related macular degeneration. 236. A composition for use of any one of aspects 232 to 235, wherein the active pharmaceutical ingredient comprises sirolimus. 237. The composition for use of any one of aspects 232 to 236, wherein the use comprises administering the composition intra-ocularly as a single dose to a human patient and a median amount of pharmaceutical active ingredient released from the composition at 1 month after administration ranges from 1% to 20% or 2% to 15% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 238. The composition for use of any one of aspects 232 to 237, wherein the use comprises administering the composition intra-ocularly as a single dose to a human patient and a median amount of pharmaceutical active ingredient released from the composition at 3 months after administration ranges from 10% to 60% or 20% to 50% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 239. The composition for use of any one of aspects 232 to 238, wherein the use comprises administering the composition intra-ocularly as a single dose to a human patient and a median amount of pharmaceutical active ingredient released from the composition at 6 months after administration to a human patient ranges from 30% to 100% or 40% to 90% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 240. The composition for use of any one of aspects 232 to 239, wherein the composition comprises from 0.1 mg to 500 mg of the pharmaceutical active ingredient. 241. The composition for use of any one of aspects 232 to 240, wherein a plasma Cmax of the pharmaceutical active ingredient ranges from 1 ng/mL to 10 ng/mL. 242. The composition for use of any one of aspects 232 to 241, wherein a plasma Cmax of the pharmaceutical active ingredient is less than 10 ng/mL. 243. Use of the combination of components in a composition as defined in any one of aspects 1 to 210 or use of the composition for the manufacture of a medicament for the treatment of an eye condition, wherein the active pharmaceutical ingredient comprises an ophthalmic drug. 244. Use of aspect 243, wherein the eye condition comprises uveitis, diabetic macular edema, or wet age-related macular degeneration. 245. Use of aspect 243, wherein the eye condition comprises uveitis or wet age-related macular degeneration. 246. Use of any one of aspects 243 to 245, wherein the active pharmaceutical ingredient comprises sirolimus. 247. The use of any one of aspects 243 to 246, wherein the composition is administered intra-ocularly as a single dose to a human patient and a median amount of pharmaceutical active ingredient released from the composition at 1 month after administration ranges from 1% to 20% or 2% to 15% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 248. The use of any one of aspects 243 to 247, wherein the composition is administered intra-ocularly as a single dose to a human patient and a median amount of pharmaceutical active ingredient released from the composition at 3 months after administration to a human patient ranges from 10% to 60% or 20% to 50% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 249. The use of any one of aspects 243 to 248, wherein the composition is administered intra-ocularly as a single dose to a human patient and a median amount of pharmaceutical active ingredient released from the composition at 6 months after administration ranges from 30% to 100% or 40% to 90% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. 250. The use of any one of aspects 243 to 249, wherein the composition comprises from 0.1 mg to 500 mg of the pharmaceutical active ingredient. 251. The use of any one of aspects 243 to 250, wherein a plasma Cmax of the pharmaceutical active ingredient ranges from 1 ng/mL to 10 ng/mL. 252. The use of any one of aspects 243 to 251, wherein a plasma Cmax of the pharmaceutical active ingredient is less than 10 ng/mL. 253. A method for forming a depot, comprising bringing the composition of any one of aspects 1 to 210 into contact with water, a phosphate buffer solution, a body fluid or a simulated body fluid. 254. A method for forming a depot, comprising bringing the composition of any one of aspects 1 to 210 into contact with the vitreous humor of a subject. 255. A unit dosage form comprising the composition of any one of aspects 1 to 210, wherein the unit dosage form comprises from 0.4 mg to 1 mg of the pharmaceutical active ingredient. 256. The unit dosage form of aspect 255, wherein the composition is contained within a vial. 257. The unit dosage form of aspect 255, wherein the composition is contained within a syringe. 258. The unit dosage form of aspect 255, wherein the composition is contained within a needle-free injector. 259. A receptacle containing the composition of any one of aspects 1 to 210. 260. A needle-free injector comprising the composition of any one of aspects 1 to 210, wherein the composition comprises a pharmaceutical active ingredient. 261. A composition for use in a method for the treatment of an eye condition in a human subject, wherein:

-   -   the composition comprises 0.2 to 3.1 wt % sirolimus, 0.9 to 1.1         wt % sucrose acetate isobutyrate (SAIB), 43.4 to 45.0 wt %         benzyl benzoate, 4.7 to 5.1 wt % ethanol, 46.2 to 48.0 wt %         polyethylene glycol and 0.01 to 1.5 wt % vitamin E; and     -   the method comprises injecting a volume of 5 to 100 μL of said         composition into the vitreous of the subject followed by not         administering further sirolimus into said vitreous of said         subject for at least 1 month.         262. The composition for use of aspect 261, wherein the         composition comprises 2.9 to 3.1 wt % sirolimus.         263. The composition for use of aspect 261 or 262, wherein the         composition comprises 43.4 to 44.2 wt % benzyl benzoate, 4.7 to         4.9 wt % ethanol and 46.2 to 47.0 wt % polyethylene glycol.         264. The composition for use any one of aspects 261 to 263,         wherein the composition comprises 0.02 to 1 wt % vitamin E.         265. The composition for use of any one of aspects 261 to 264,         wherein the composition comprises less than 1 wt % vitamin E.         266. The composition for use of any one of aspects 261 to 265,         wherein the composition comprises 0.5 wt % or less vitamin E.         267. The composition for use of any one of aspects 261 to 266,         wherein the composition comprises less than 0.1 wt % vitamin E.         268. The composition for use of any one of aspects 261 to 267,         wherein the composition comprises 0.02 to 0.09 wt % vitamin E.         269. The composition for use of any one of aspects 261 to 264,         wherein the composition comprises about 3 wt % sirolimus, about         1 wt % SAIB, about 43.7 wt % benzyl benzoate, about 4.8 wt %         ethanol, about 46.5 wt % polyethylene glycol and about 1 wt %         vitamin E.         270. The composition for use of any one of aspects 261 to 269,         wherein the polyethylene glycol is PEG400.         271. The composition for use of any one of aspects 261 to 270,         wherein the composition consists essentially of sirolimus, SAIB,         benzyl benzoate, ethanol, polyethylene glycol and vitamin E.         272. The composition for use of any one of aspects 261 to 271,         wherein the composition consists of sirolimus, SAIB, benzyl         benzoate, ethanol, polyethylene glycol and vitamin E.         273. The composition for use of any one of aspects 261 to 272,         wherein the method comprises injecting a volume of 10 μL to 30         μL of said composition into the vitreous of the subject followed         by not administering further sirolimus into said vitreous of         said subject for at least 1 month.         274. The composition for use of any one of aspects 261 to 273,         wherein the method comprises injecting a volume of 19 μL or         lower of said composition into the vitreous of the subject         followed by not administering further sirolimus into said         vitreous of said subject for at least 1 month.         275. The composition for use of any one of aspects 261 to 272,         wherein the method comprises injecting a volume of 51 μL or         higher of said composition into the vitreous of the subject         followed by not administering further sirolimus into said         vitreous of said subject for at least 1 month.         276. The composition for use of any one of aspects 261 to 275,         wherein the eye condition is uveitis, diabetic macular edema or         wet age-related macular degeneration.         277. The composition for use of aspect 276, wherein the eye         condition is uveitis.         278. The composition for use of aspect 276, wherein the eye         condition is diabetic macular edema.         279. The composition for use of aspect 276, wherein the eye         condition is wet age-related macular degeneration.         280. The composition for use of any one of aspects 261 to 279,         wherein the method comprises injecting said volume of said         composition into the vitreous of the subject followed by not         administering further sirolimus into said vitreous of said         subject for at least 2 months.         281. The composition for use of any one of aspects 261 to 280,         wherein the method comprises injecting said volume of said         composition into the vitreous of the subject followed by not         administering further sirolimus into said vitreous of said         subject for at least 3 months.         282. The composition for use of any one of aspects 261 to 281,         wherein said injecting said volume of said composition into the         vitreous of the subject occurs at least one month after any         previous administration of sirolimus into said vitreous of said         subject.         283. The composition for use of any one of aspects 261 to 282,         wherein said injecting said volume of said composition into the         vitreous of the subject occurs at least two months after any         previous administration of sirolimus into said vitreous of said         subject.         284. The composition for use of any one of aspects 261 to 283,         wherein said injecting said volume of said composition into the         vitreous of the subject occurs at least three months after any         previous administration of sirolimus into said vitreous of said         subject.         285. The composition for use of any one of aspects 261 to 284,         where the method comprises injecting said volume of said         composition in one dose.         286. The composition for use of any one of aspects 261 to 285,         wherein said composition is in unit dose form, said unit dose         form containing a unit dose of said composition that is equal to         the volume of said composition that is injected in said method.         287. The composition for use of aspect 286, wherein said unit         dose is contained in a pre-filled syringe or a container         suitable for transferring said unit dose to a syringe.         288. The composition for use of any one of aspects 261 to 287,         where the method comprises injecting said volume of said         composition from a syringe that comprises glass.         289. The composition for use of any one of aspects 261 to 287,         where the method comprises injecting said volume of said         composition from a syringe that comprises a polymer.         290. The composition for use of aspect 289, wherein the syringe         comprises a polymer that comprises at least one member selected         from cyclic olefin polymer, cyclic olefin copolymer, and         polypropylene         291. The composition for use of any one of aspects 261 to 290,         where the method comprises injecting said volume of said         composition from a syringe that comprises a metal plunger.         292. The composition for use of aspect 291, wherein the metal         plunger is a stainless steel plunger.         293. The composition for use of any one of aspects 261 to 292,         wherein the method comprises injecting said volume of said         composition from a leur-lock syringe.         294. A composition that:         (i) comprises sirolimus, sucrose acetate isobutyrate, benzyl         benzoate, polyethylene glycol, ethanol and vitamin E in amounts         by weight as set out in any one of A to I:

Composition A B C D E Sirolimus 0.2-3.1 0.2-3.1 0.2-3.1 0.2-3.1 0.2-3.1 SAIB 1.9-2.1 2.9-3.1 3.9-4.1 4.8-5.1 5.8-6.0 Benzyl 42.4-44.0 41.4-43.0 40.4-42.0 39.5-41.0 38.5-40.0 benzoate Polyethylene 46.2-48.0 46.2-48.0 46.2-48.0 46.2-48.0 46.2-48.0 glycol Ethanol 4.7-5.1 4.7-5.1 4.7-5.1 4.7-5.1 4.7-5.1 Vitamin E 0.01-1.5  0.01-1.5  0.01-1.5  0.01-1.5  0.01-1.5  Composition F G H I Sirolimus 0.2-3.1 0.2-3.1 0.2-3.1 0.2-3.1 SAIB 6.7-7.0 7.7-8.0 8.7-9.0  9.6-10.1 Benzyl 37.6-39.0 36.6-38.0 35.6-37.0 34.7-36.0 benzoate Polyethylene 46.2-48.0 46.2-48.0 46.2-48.0 46.2-48.0 glycol Ethanol 4.7-5.1 4.7-5.1 4.7-5.1 4.7-5.1 Vitamin E 0.01-1.5  0.01-1.5  0.01-1.5  0.01-1.5;  or (ii) comprises sirolimus, sucrose acetate isobutyrate, benzyl benzoate, ethanol and vitamin E in amounts by weight as set out in any one of J to T:

Composition J K L M N Sirolimus 0.2-3.1 0.2-3.1 0.2-3.1 0.2-3.1 0.2-3.1 SAIB 0.9-1.1 1.9-2.1 2.8-3.0 3.8-4.0 4.8-5.1 Benzyl 89.7-91.2 88.7-90.1 87.8-89.2 86.8-88.2 85.8-87.2 benzoate Ethanol 4.7-5.1 4.7-5.1 4.7-5.1 4.7-5.1 4.7-5.1 Vitamin E 0.01-1.5  0.01-1.5  0.01-1.5  0.01-1.5  0.01-1.5  Composition O P R S T Sirolimus 0.2-3.1 0.2-3.1 0.2-3.1 0.2-3.1 0.2-3.1 SAIB 5.7-6.0 6.7-7.0 7.7-8.9 8.6-9.0  9.6-10.0 Benzyl 84.9-86.3 83.9-85.3 82.9-84.3 82.0-83.4 81.0-82.4 benzoate Ethanol 4.7-5.1 4.7-5.1 4.7-5.1 4.7-5.1 4.7-5.1 Vitamin E 0.01-1.5  0.01-1.5  0.01-1.5  0.01-1.5  0.01-1.5  295. The composition of aspect 294, wherein the composition comprises 2.9 to 3.1 wt % sirolimus. 296. The composition of aspect 286, wherein the composition comprises 0.02 to 1 wt % vitamin E. 297. The composition of aspect 294 or 295, which: (i) comprises sirolimus, sucrose acetate isobutyrate, benzyl benzoate, polyethylene glycol, ethanol and vitamin E in about the amounts by weight as set out in any one of A′ to I′:

Composition A′ B′ C′ D′ E′ Sirolimus 3 3 3 3 3 SAIB 2 3 4 4.9 5.9 Benzyl benzoate 42.7 41.7 40.7 39.8 38.8 Polyethylene glycol 46.5 46.5 46.5 46.5 46.5 Ethanol 4.8 4.8 4.8 4.8 4.8 Vitamin E 1 1 1 1 1 Composition F′ G′ H′ I′ Sirolimus 3 3 3 3   SAIB 6.8 7.8 8.8 9.7 Benzyl benzoate 37.9 36.9 35.9 35   Polyethylene glycol 46.5 46.5 46.5 46.5  Ethanol 4.8 4.8 4.8 4.8 Vitamin E 1 1 1 1;  or (ii) comprises sirolimus, sucrose acetate isobutyrate, benzyl benzoate, ethanol and vitamin E in about the amounts by weight as set out in any one of J′ to T′:

Composition J′ K′ L′ M′ N′ Sirolimus 3 3 3 3 3 SAIB 1 2 2.9 3.9 4.9 Benzyl benzoate 90.2 89.2 88.3 87.3 86.3 Ethanol 4.8 4.8 4.8 4.8 4.8 Vitamin E 1 1 1 1 1 Composition O′ P′ R′ S′ T′ Sirolimus 3 3 3 3 3 SAIB 5.8 6.8 7.8 8.7 9.7 Benzyl benzoate 85.4 84.4 83.4 82.5 81.5 Ethanol 4.8 4.8 4.8 4.8 4.8 Vitamin E 1 1 1 1 1 298. The composition of any one of aspects 294 to 297, wherein the polyethylene glycol is PEG400. 299. The composition of any one of aspects 294 to 298, wherein the composition (i) consists essentially of sirolimus, SAIB, benzyl benzoate, ethanol, polyethylene glycol and vitamin E; and the composition (ii) consists essentially of sirolimus, SAIB, benzyl benzoate, ethanol and vitamin E. 300. The composition of any one of aspects 294 to 290, wherein the composition (i) consists of sirolimus, SAIB, benzyl benzoate, ethanol, polyethylene glycol and vitamin E; and the composition (ii) consists of sirolimus, SAIB, benzyl benzoate, ethanol and vitamin E. 301. A unit dose form that contains a unit dose of a volume of 5 to 100 μL of a composition as defined in any one of aspects 294 to 300. 302. The unit dose form of aspect 301, wherein the volume of the composition is 10 to 30 μL. 303. A composition as defined in any one of aspects 294 to 300 or a unit dose form as defined in aspect 301 or 302 for use in a method for the treatment of an eye condition in a human subject. 304. The composition or unit dose form for use of aspect 303, wherein the method comprises injecting said composition or unit dose form into the vitreous of the subject followed by not administering further sirolimus into said vitreous of said subject for at least 1 month. 305. The composition or unit dose form for use of aspect 303 or 304, wherein the eye condition is uveitis, diabetic macular edema or wet age-related macular degeneration. 306. A composition that comprises 0.2 to 3.1 wt % sirolimus, 0.9 to 1.1 wt % sucrose acetate isobutyrate (SAIB), 43.4 to 45.0 wt % benzyl benzoate, 4.7 to 5.1 wt % ethanol, 46.2 to 48.0 wt % polyethylene glycol and at least 0.01 wt % but less than 1 wt % vitamin E. 307. The composition of aspect 306, wherein the composition comprises 2.9 to 3.1 wt % sirolimus. 308. The composition of aspect 306 or 307, which comprises 0.02 to 0.9 wt % vitamin E. 309. The composition of any one of aspects 306 to 308, which comprises 0.5 wt % or less vitamin E. 310. The composition of any one of aspects 306 to 309, which comprises less than 0.1 wt % vitamin E. 311. The composition of any one of aspects 306 to 310, which comprises 0.02 to 0.09 wt % vitamin E. 312. The composition of any one of aspects 306 to 311, wherein the polyethylene glycol is PEG400. 313. The composition of any one of aspects 306 to 312, wherein the composition consists essentially of sirolimus, SAIB, benzyl benzoate, ethanol, polyethylene glycol and vitamin E. 314. The composition of any one of aspects 306 to 313, wherein the composition consists of sirolimus, SAIB, benzyl benzoate, ethanol, polyethylene glycol and vitamin E. 315. A unit dose form that contains a unit dose of a volume of 5 to 100 μl of a composition as defined in any one of aspects 306 to 314. 316. The unit dose form of aspect 315, wherein the volume of the composition is 10 to 30 μL. 317. A composition as defined in any one of aspects 306 to 314 or a unit dose form as defined in aspect 315 or 316 for use in a method for the treatment of an eye condition in a human subject 318. The composition or unit dose form for use of aspect 317, wherein the method comprises injecting said composition or unit dose form into the vitreous of the subject followed by not administering further sirolimus into said vitreous of said subject for at least 1 month. 319. The composition or unit dose form for use of aspect 317 or 318, wherein the eye condition is uveitis, diabetic macular edema or wet age-related macular degeneration. 320. A dosage form comprising a vial containing a composition, wherein:

the composition comprises an active pharmaceutical ingredient, a high viscosity liquid carrier material (HVLCM), a first hydrophobic solvent, and a hydrophilic solvent; and

the composition has a volume ranging from about 35 μL to about 1900 μL.

321. The dosage form of aspect 320, wherein the composition has a volume ranging from about 50 μL to about 1000 μL.

322. The dosage form of any one of aspects 320 to 321, wherein the composition is a solution at 25° C. and 1 atmosphere and/or wherein the composition has a viscosity ranging from about 1 cP to about 150 cP at 25° C. and 1 atmosphere.

323. The dosage form of any one of aspects 320 to 322, wherein:

the HVLCM is present in an amount ranging from about 0.5 wt % to about 15 wt %, based on weight of the composition, and

the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 50 wt %, based on weight of the composition.

324. The dosage form of any one of aspects 320 to 323, wherein:

the HVLCM is present in an amount ranging from about 0.5 wt % to about 15 wt %, based on weight of the composition, and

the first hydrophobic solvent is present in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition.

325. The dosage form of any one of aspects 320 to 324, wherein the composition further comprises an antioxidant.

326. The dosage form of any one of aspects 320 to 325, wherein the composition further comprises a polyalkylene glycol.

327. The dosage form of aspect 326, wherein the polyalkylene glycol is present in an amount ranging from about 40 wt % to about 55 wt %.

328. The dosage form of any one of aspects 320 to 326, wherein the active pharmaceutical ingredient comprises sirolimus.

329. The dosage form of aspect 320, wherein the composition comprises 0.2 to 3.1 wt % sirolimus, 0.9 to 1.1 wt % sucrose acetate isobutyrate (SAIB), 43.4 to 45.0 wt % benzyl benzoate, 4.7 to 5.1 wt % ethanol, 46.2 to 48.0 wt % polyethylene glycol and 0.01 to 1.5 wt % vitamin E. 330. The dosage form of any one of aspects 320 to 329, wherein the composition comprises 0.02 to 1 wt % vitamin E. 331. The dosage form of any one of aspects 320 to 330, wherein the composition comprises less than 1 wt % vitamin E. 332. The dosage form of any one of aspects 320 to 331, wherein the composition comprises 0.5 wt % or less vitamin E. 333. The dosage form of any one of aspects 320 to 332, wherein the composition comprises less than 0.1 wt % vitamin E. 334. The dosage form of any one of aspects 320 to 333, wherein the composition comprises 0.02 to 0.09 wt % vitamin E. 335. The dosage form of any one of aspects 320 to 329, wherein the composition comprises about 3 wt % sirolimus, about 1 wt % SAIB, about 43.7 wt % benzyl benzoate, about 4.8 wt % ethanol, about 46.5 wt % polyethylene glycol, and about 1 wt % vitamin E. 336. The dosage form of any one of aspects 326 to 335, wherein the polyalkylene glycol is PEG400. 337. The dosage form of any one of aspects 320 to 336, wherein the composition consists essentially of sirolimus, SAIB, benzyl benzoate, ethanol, polyethylene glycol and vitamin E. 338. The dosage form of any one of aspects 320 to 336, wherein the composition consists of sirolimus, SAIB, benzyl benzoate, ethanol, polyethylene glycol and vitamin E. 339. The dosage form of any one of aspects 320 to 228, wherein the composition is as defined in any one of aspects 261 to 319. 340. A dosage form comprising a syringe containing a composition, wherein:

the composition comprises an active pharmaceutical ingredient, a high viscosity liquid carrier material (HVLCM), a first hydrophobic solvent, and a hydrophilic solvent; and

the composition has a volume ranging from about 5 μL to about 100 μL.

341. The dosage form of aspect 340, wherein the composition is a solution at 25° C. and 1 atmosphere and/or wherein the composition has a viscosity ranging from about 1 cP to about 150 cP at 25° C. and 1 atmosphere.

342. The dosage form of any one of aspects 340 and 341, wherein:

the HVLCM is present in an amount ranging from about 0.5 wt % to about 15 wt %, based on weight of the composition, and

the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 50 wt %, based on weight of the composition.

343. The dosage form of any one of aspects 340 to 341, wherein:

the HVLCM is present in an amount ranging from about 0.5 wt % to about 15 wt %, based on weight of the composition, and

the first hydrophobic solvent is present in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition.

344. The dosage form of any one of aspects 340 to 343, wherein the composition further comprises an antioxidant.

345. The dosage form of any one of aspects 340 to 344, wherein the composition further comprises a polyalkylene glycol.

346. The dosage form of aspect 345, wherein the polyalkylene glycol is present in an amount ranging from about 40 wt % to about 55 wt %.

347. The dosage form of any one of aspects 340 to 346, wherein the active pharmaceutical ingredient comprises sirolimus.

348. The dosage form of aspect 340, wherein the composition comprises 0.2 to 3.1 wt % sirolimus, 0.9 to 1.1 wt % sucrose acetate isobutyrate (SAIB), 43.4 to 45.0 wt % benzyl benzoate, 4.7 to 5.1 wt % ethanol, 46.2 to 48.0 wt % polyethylene glycol and 0.01 to 1.5 wt % vitamin E. 349. The dosage form of any one of aspects 340 to 348, wherein the composition comprises 0.02 to 1 wt % vitamin E. 350. The dosage form of any one of aspects 340 to 348, wherein the composition comprises less than 1 wt % vitamin E. 351. The dosage form of any one of aspects 340 to 348, wherein the composition comprises 0.5 wt % or less vitamin E. 352. The dosage form of any one of aspects 329 to 337, wherein the composition comprises less than 0.1 wt % vitamin E. 353. The dosage form of any one of aspects 340 to 348, wherein the composition comprises 0.02 to 0.09 wt % vitamin E. 354. The dosage form of any one of aspects 340 to 348, wherein the composition comprises about 3 wt % sirolimus, about 1 wt % SAIB, about 43.7 wt % benzyl benzoate, about 4.8 wt % ethanol, about 46.5 wt % polyethylene glycol, and about 1 wt % vitamin E. 355. The dosage form of any one of aspects 345 to 354, wherein the polyalkylene glycol is PEG400. 356. The dosage form of any one of aspects 340 to 355, wherein the composition consists essentially of sirolimus, SAIB, benzyl benzoate, ethanol, polyethylene glycol and vitamin E. 357. The dosage form of any one of aspects 340 to 355, wherein the composition consists of sirolimus, SAIB, benzyl benzoate, ethanol, polyethylene glycol and vitamin E. 358. The dosage form of any one of aspects 340 to 357, wherein the syringe comprises glass. 359. The dosage form of any one of aspects 340 to 357, wherein the syringe comprises a polymer. 360. The dosage form of aspect 359, wherein the polymer comprises at least one member selected from cyclic olefin polymer, cyclic olefin copolymer, and polypropylene. 316. The dosage form of any one of aspects 340 to 360, wherein the syringe comprises a metal plunger. 362. The dosage form of aspect 361, wherein the metal plunger comprises a stainless steel plunger. 363. The dosage form of any one of aspects 340 to 262, wherein the syringe comprises a leur-lock syringe. 264. The dosage form of any one of aspects 340 to 363, wherein the syringe is contained within a receptacle. 365. The dosage form of aspect 364, wherein the receptacle comprises a box. 366. The dosage form of any one of aspects 340 to 365, wherein the composition is as defined in any one of aspects 261 to 319. 367. A composition comprising:

an active pharmaceutical ingredient;

a high viscosity liquid carrier material (HVLCM);

a first hydrophobic solvent;

a hydrophilic solvent; and

vitamin E, wherein the vitamin is present in an amount less than 0.1 wt %.

368. The composition of aspect 367, wherein the vitamin is present in an amount ranging from 0.02 wt % to 0.09 wt %.

369. The composition of any one of aspects 367 to 368, wherein the composition is a solution at 25° C. and 1 atmosphere and/or wherein the composition has a viscosity ranging from about 1 cP to about 150 cP at 25° C. and 1 atmosphere.

370. The composition of any one of aspects 367 to 369, wherein:

the HVLCM is present in an amount ranging from about 0.5 wt % to about 15 wt %, based on weight of the composition, and

the first hydrophobic solvent is present in an amount ranging from about 30 wt % to about 50 wt %, based on weight of the composition.

371. The composition of any one of aspects 367 to 369, wherein:

the HVLCM is present in an amount ranging from about 0.5 wt % to about 15 wt %, based on weight of the composition, and

the first hydrophobic solvent is present in an amount ranging from about 80 wt % to about 95 wt %, based on weight of the composition.

372. The composition of any one of aspects 367 to 371, wherein the composition further comprises a polyalkylene glycol.

373. The composition of aspect 372, wherein the polyalkylene glycol is present in an amount ranging from about 40 wt % to about 55 wt %.

374. The composition of any one of aspects 367 to 373, wherein the active pharmaceutical ingredient comprises sirolimus.

375. The composition of aspect 367, wherein the composition comprises 0.2 to 3.1 wt % sirolimus, 0.9 to 1.1 wt % sucrose acetate isobutyrate (SAIB), 43.4 to 45.0 wt % benzyl benzoate, 4.7 to 5.1 wt % ethanol, 46.2 to 48.0 wt % polyethylene glycol and 0.02 to 0.09 wt % vitamin E. 376. The composition of any one of aspects 371 to 375, wherein the polyalkylene glycol is PEG400. 377. The composition of any one of aspects 367 to 376, wherein the composition consists essentially of sirolimus, SAIB, benzyl benzoate, ethanol, polyethylene glycol and vitamin E. 378. The composition of any one of aspects 367 to 376, wherein the composition consists of sirolimus, SAIB, benzyl benzoate, ethanol, polyethylene glycol and vitamin E. 379. The dosage form of any one of aspects 367 to 378, wherein the composition is as defined in any one of aspects 261 to 319. 380. A composition that comprises 0.2 to 3.1 wt % sirolimus, 0.9 to 1.1 wt % sucrose acetate isobutyrate (SAIB), 89.6 to 93 wt % benzyl benzoate, 4.9 to 5.1 wt % ethanol and at least 0.01 wt % but less than 1 wt % vitamin E. 381. The composition of aspect 380, wherein the composition comprises 2.9 to 3.1 wt % sirolimus. 382. The composition of aspect 380 or 381, which comprises 0.02 to 0.9 wt % vitamin E. 383. The composition of any one of aspects 380 to 382, which comprises 0.5 wt % or less vitamin E. 384. The composition of any one of aspects 380 to 383, which comprises less than 0.1 wt % vitamin E. 385. The composition of any one of aspects 380 to 384, which comprises 0.02 to 0.09 wt % vitamin E. 386. The composition of any one of aspects 380 to 385, wherein the composition consists essentially of sirolimus, SAIB, benzyl benzoate, ethanol and vitamin E. 387. The composition of any one of aspects 380 to 386, wherein the composition consists of sirolimus, SAIB, benzyl benzoate, ethanol and vitamin E. 388. A unit dose form that contains a unit dose of a volume of 5 to 100 μL of a composition as defined in any one of aspects 380 to 387. 389. The unit dose form of aspect 388, wherein the volume of the composition is 10 to 30 μL. 390. A composition as defined in any one of aspects 380 to 387 or a unit dose form as defined in aspect 388 or 389 for use in a method for the treatment of an eye condition in a human subject 391. The composition or unit dose form for use of aspect 390, wherein the method comprises injecting said composition or unit dose form into the vitreous of the subject followed by not administering further sirolimus into said vitreous of said subject for at least 1 month. 392. The composition or unit dose form for use of aspect 390 or 391, wherein the eye condition is uveitis, diabetic macular edema or wet age-related macular degeneration.

BRIEF DESCRIPTIONS OF THE DRAWINGS

FIGS. 1a, 1b, and 1c show in vitro drug release from several compositions of the present disclosure.

FIG. 2 shows in vitro drug release from a composition of the present disclosure in 0.05% hyaluronic acid (HA) medium.

FIG. 3 shows cumulative release profile of sirolimus formulations in PBS medium containing 0.1% SDS.

FIG. 4 shows sirolimus remaining in vitreous humor over 6 months obtained from intravitreal depots from compositions of the present disclosure.

FIG. 5 shows sirolimus in rabbit retinoid choroid (RC) (6-month data).

FIG. 6 shows sirolimus remaining in vitreous humor as described in more detail below in Example 5.

FIG. 7 shows sirolimus concentration in RC over time as described in more detail below in Example 5.

FIG. 8 shows sirolimus blood concentration after placement of intravitreal depots as described in more detail below in Example 5.

FIG. 9 shows the remaining dose amount in the intravitreal depot. Each point represents mean±SD (3-4 eyes). Time 0 is nominal value (100%).

FIG. 10 shows sirolimus remaining in vitreous humor as described in more detail below in Example 9.

FIG. 11 shows sirolimus concentration in RC over time as described in more detail below in Example 9.

FIG. 12 shows sirolimus blood concentration after placement of intravitreal depots as described in more detail below in Example 9.

FIG. 13 shows sirolimus remaining in vitreous humor as described in more detail below in Example 10.

FIG. 14 shows sirolimus concentration in RC over time as described in more detail below in Example 10.

FIG. 15 shows sirolimus blood concentration after placement of intravitreal depots as described in more detail below in Example 10.

FIG. 16 shows sirolimus remaining in vitreous humor as described in more detail below in Example 11.

FIG. 17 shows sirolimus concentration in RC over time as described in more detail below in Example 11.

FIG. 18 shows sirolimus blood concentration after placement of intravitreal depots as described in more detail below in Example 11.

FIG. 19 shows sirolimus remaining in vitreous humor as described in more detail below in Example 12.

FIG. 20 shows sirolimus concentration in RC over time as described in more detail below in Example 12.

FIG. 21 shows sirolimus blood concentration after placement of intravitreal depots as described in more detail below in Example 12.

FIG. 22 plots the density at 25° C. of mixtures consisting of SAIB and vitamin E, as a function of the weight ratio of SAIB:VE.

FIG. 23 shows the release profiles of inventive compositions comprising fluocinolone as active pharmaceutical ingredient.

FIG. 24 shows the release profiles of inventive compositions comprising triamcinolone as active pharmaceutical ingredient.

FIG. 25 shows the release profiles of inventive compositions comprising ibuprofen as active pharmaceutical ingredient.

FIG. 26 shows sirolimus remaining in vitreous humor as described in more detail below in Example 20.

FIG. 27 shows sirolimus blood concentration after placement of intravitreal depots as described in more detail below in Example 20.

FIG. 28 shows sirolimus remaining in vitreous humor as described in more detail below in Example 21.

FIG. 29 shows sirolimus blood concentration after placement of intravitreal depots as described in more detail below in Example 21.

FIG. 30 shows the effect of Vitamin E concentration on the amount of sirolimus remaining after storage at 60° C. as described in more detail in Example 22.

FIG. 31 shows the effect of Vitamin E concentration on the amount of sirolimus remaining after storage at 37° C. as described in more detail in Example 22.

DETAILED DESCRIPTION

Quantities may be described herein as a set of upper preferred values and a set of lower preferred values. Preferred ranges include any ranges formed from an upper preferred value and a lower preferred value, as well as two lower preferred values and two upper preferred values. The Examples also disclose quantities (e.g., weight percents, ratios, etc.). Preferred ranges also include ranges formed from two values disclosed in examples, and ranges formed from one value disclosed in an example, and another value disclosed in either a set of upper or lower values. All such ranges are expressly disclosed herein.

Unless indicated otherwise, references herein to a particular volume of a composition, unit dose form, and the like, indicates a volume measured at a temperature of 20° C. and a pressure of 1 atm.

Formulations according to the present disclosure generally comprise an active pharmaceutical ingredient (API) in a carrier composition. In some cases, the carrier composition comprises one or more of a high viscosity liquid carrier material (HVLCM), a hydrophobic solvent, a hydrophilic solvent, and an antioxidant. In some cases, the carrier composition comprises one or more of a high viscosity liquid carrier material (HVLCM), a hydrophobic solvent, a hydrophilic solvent, a polymer, an antioxidant, and other excipients.

Any biologically active substance (BAS) or active pharmaceutical ingredient (API) or active compound suitable for a depot formulation may be used in compositions of the present disclosure. Furthermore, as used herein, descriptions regarding administration, dosages, weight percent, and similar aspects of the present disclosure set forth herein with regard to any one of BAS, API, or active compound are intended to also apply to the other substances, ingredients, or compounds, unless otherwise noted. Some exemplary classes of API include immunosuppressants, anti-inflammatories, and antibiotics. Biologically active substances, API's, and active compounds described herein also include pharmaceutically acceptable prodrugs, derivatives, analogs, salts, derivatives, and esters thereof.

The term “biologically active substance” as used herein refers to an inorganic or organic molecule including a drug, peptide, protein, carbohydrate (including monosaccharides, oligosaccharides, and polysaccharides), nucleoprotein, mucoprotein, lipoprotein, synthetic polypeptide or protein, or a small molecule linked to a protein, glycoprotein, steroid, nucleic acid (any form of DNA, including cDNA, or RNA, or a fragment thereof), nucleotide, nucleoside, oligonucleotides (including antisense oligonucleotides), gene, lipid, hormone, or combination thereof, that causes a biological effect when administered in vivo to an animal, including but not limited to birds and mammals, including humans.

Suitable proteins include, but are not limited to, human growth hormone, fibroblast growth factor (FGF), erythropoietin (EPO), platelet derived growth factor (PDGF), granulocyte colony stimulating factor (g-CSF), bovine somatotropin (BST), tumor necrosis factor (TNF), transforming growth factor-beta (TGF-Beta), interleukins, insulin, and interferons, such as α-interferon, β-interferon, and the like.

The term drug (or active pharmaceutical ingredient, API), as used herein, refers to any substance used internally or externally as a medicine for the treatment, cure, or prevention of a disease or disorder, and includes but is not limited to immunosuppressants, anesthetics, analgesics, chemotherapeutic agents, steroids (including retinoids), hormones, antibiotics, antivirals, antifungals, antiproliferatives, antihistamines, anticoagulants, antiphoto-aging agents, melanotropic peptides, nonsteroidal and steroidal anti-inflammatory compounds, antipsychotics, and radiation absorbers, including UV-absorbers.

The term biologically active substance also includes agents such as insecticides, pesticides, fungicides, rodenticides, and plant nutrients and growth promoters.

The term pharmaceutically acceptable means safe and effective for pharmaceutical use, which can include human or veterinary use, preferably human use. A composition that is pharmaceutically acceptable is preferably suitable for use to treat a medical condition in an animal or human. A pharmaceutically acceptable composition preferably comprises, consists essentially of, or consists of, a combination of one or more active pharmaceutical ingredients, and one or more pharmaceutically acceptable excipients.

Immunosuppressants include any immunosuppressant useful in depot formulations, including macrolide lactones, cyclosporines, and others. Immunosuppressants include APIs having immunosuppressant activity, even if the API is not primarily used as an immunosuppressant in any particular formulation or use thereof.

Therapeutic agents that may be used include but are not limited to compounds that act by binding members of the immunophilin family of cellular proteins. Such compounds are known as “immunophilin binding compounds.” Immunophilin binding compounds include but are not limited to the “limus” family of macrolide lactone compounds. Examples of limus compounds that may be used include but are not limited to sirolimus (rapamycin) and its water soluble analog SDZ-RAD (Novartis), TAFA-93 (Isotechnika), tacrolimus, everolimus, RAD-001 (Novartis), pimecrolimus, temsirolimus, CCI-779 (Wyeth), AP23841 (Ariad), AP23573 (Ariad), and ABT-578 (Abbott Laboratories). Limus compound analogs and derivatives that may be used include but are not limited to the compounds described in U.S. Pat. Nos. 5,527,907; 6,376,517; 6,329,386; and 6,890,546, each of which is incorporated herein by reference in their entirety. Therapeutic agents also include analogs, prodrugs, salts, derivatives and esters of limus compounds.

In some compositions of the present disclosure the therapeutic agent comprises, consists essentially of, or consists of, a limus compound. In some compositions of the present disclosure the therapeutic agent comprises, consists essentially of, or consists of, an immunophilin binding compound. In some compositions of the present disclosure the therapeutic agent comprises, consists essentially of, or consists of, an mTOR inhibitor or an analog, derivative, salt, ester or prodrug thereof (e.g., TAFA93). In some compositions of the present disclosure the therapeutic agent comprises, consists essentially of, or consists of, a cyclophilin or an FK-506 binding protein (FKBP).

Other sirolimus derivatives that may be used include, without limitation, 7-epi-rapamycin, 7-thiomethyl-rapamycin, 7-epi-trimethoxyphenyl-rapamycin, 7-epi-thiomethyl-rapamycin, 7-demethoxy-rapamycin, 32-demethoxy-rapamycin, 2-desmethyl-rapamycin, mono- and di-ester derivatives of rapamycin, 27-oximes of rapamycin; 42-oxo analog of rapamycin; bicyclic rapamycins; rapamycin dimers; silyl ethers of rapamycin; rapamycin arylsulfonates and sulfamates, mono-esters and di-esters at positions 31 and 42, 30-demethoxy rapamycin, and other derivatives described in Vezina et al., “Rapamycin (AY-22,989), A New Antifungal Antibiotic. I. Taxonomy Of The Producing Streptomycete And Isolation Of The Active Principle” J. Antibiot. (Tokyo) 28:721-726 (1975); Sehgal et al., “Rapamycin (AY-22,989), A New Antifungal Antibiotic. II. Fermentation, Isolation And Characterization” J. Antibiot. (Tokyo) 28:727-732 (1975); Sehgal et al., “Demethoxyrapamycin (AY-24,668), A New Antifungal Antibiotic” J. Antibiot. (Tokyo) 36:351-354 (1983); and Paiva et al., “Incorporation Of Acetate, Propionate, And Methionine Into Rapamycin By Streptomycetes hygroscopicus” J Nat Prod 54:167-177 (1991), WO 92/05179, EP 467606, Caufield et al., “Hydrogenated Rapamycin Derivatives” U.S. Pat. No. 5,023,262; Kao et al., “Bicyclic Rapamycins” U.S. Pat. No. 5,120,725; Kao et al., “Rapamycin Dimers” U.S. Pat. No. 5,120,727; Failli et al., “Silyl Ethers Of Rapamycin” U.S. Pat. No. 5,120,842; Failli et al., “Rapamycin 42-Sulfonates And 42-(N-carboalkoxy) Sulfamates Useful As Immunosuppressive Agents” U.S. Pat. No. 5,177,203; Nicolaou et al., “Total Synthesis Of Rapamycin” J. Am. Chem. Soc. 115: 4419-4420 (1993); Romo et al, “Total Synthesis Of (−) Rapamycin Using An Evans-Tishchenko Fragment Coupling” J. Am. Chem. Soc. 115:7906-7907 (1993); and Hayward et al, “Total Synthesis Of Rapamycin Via A Novel Titanium-Mediated Aldol Macrocyclization Reaction” J. Am. Chem. Soc., 115:9345-9346 (1993), each of which is incorporated herein by reference in its entirety.

The limus family of compounds may be used in the formulations and methods for the treatment, prevention, inhibition, delaying the onset of, or causing the regression of the diseases and conditions described herein.

Additional non-limiting examples of pharmacological materials include anti-infectives such as nitrofurazone, sodium propionate, antibiotics (including penicillin, tetracycline, oxytetracycline, chlorotetracycline, bacitracin, nystatin, streptomycin, neomycin, polymyxin, gramicidin, chloramphenicol, erythromycin, and azithromycin), sulfonamides, including sulfacetamide, sulfamethizole, sulfamethazine, sulfadiazine, sulfamerazine, and sulfisoxazole, and anti-virals including idoxuridine, ganciclovir, trifluridine, and vidarabine; anti-inflammatories such as NSAIDS (including acetyl salicylic acid, ibuprofen, ketoprofen, naproxen, celecoxib, diclofenac, diflunisal, etodolac, indomethacin, ketorolac, nabumetone, oxiprozin, piroxicam, salsalate, and tolmetin), steroids or glucocorticosteroids (including prednisolone, prednisone, medrol, beclomethsone, budesonide, flunisolide, fluticasone and triamcinolone); analgesics such as NSAIDS, opioids (including morphine, fentanyl, tramadol, oxycodone, methadone, hydrocodone, hydromorphone, loperamide, meperidine, tapentadol, oxymorphone, propoxyphene, remifentanil, sufentanil, alfentanil, levorphanol, codeine, and dihydrocodeine), and paracetamol (acetaminophen); antiallergenics such as antazoline, methapyritene, chlorpheniramine, pyrilamine prophenpyridamine, hydrocortisone, cortisone, hydrocortisone acetate, dexamethasone, dexamethasone 21-phosphate, fluocinolone, triamcinolone, medrysone, prednisolone, prednisolone 21-sodium succinate, and prednisolone acetate; desensitizing agents such as ragweed pollen antigens, hay fever pollen antigens, dust antigen and milk antigen; vaccines such as smallpox, yellow fever, distemper, hog cholera, chicken pox, antivenom, scarlet fever, diphtheria toxoid, tetanus toxoid, pigeon pox, whooping cough, influenza, rabies, mumps, measles, poliomyelitic, and Newcastle disease; decongestants such as phenylephrine, naphazoline, and tetrahydrazoline; miotics and anticholinesterases such as pilocarpine, esperine salicylate, carbachol, diisopropyl fluorophosphate, phospholine iodide, and demecarium bromide; parasympatholytics such as atropine sulfate, cyclopentolate, homatropine, scopolamine, tropicamide, eucatropine, and hydroxyamphetamine; sympathomimetics such as epinephrine; antipsychotics, such as olanzapine, risperidone; narcotic antagonists, such as naltrexone, naloxone, nalnothene; sedatives and hypnotics such as pentobarbital sodium, phenobarbital, secobarbital sodium, codeine, (a-bromoisovaleryl) urea, carbromal; psychic energizers such as 3-(2-aminopropyl) indole acetate and 3-(2-aminobutyl) indole acetate; tranquilizers such as reserpine, chlorpromayline, and thiopropazate; anesthetics, such as benzocaine, bupivacaine, etidocaine, lidocaine, mepivacaine, pramoxine, prilocaine, procaine, proparacaine, ropivacaine, tetracaine, levobupivacaine, chloroprocaine, butacaine, propoxycaine, phenacaine, hexylcaine, isobucaine, cyclomethycaine, benoxinate, diperodon, dibucaine, meprylcaine, dimethisoquin, pramoxine, butamben, dyclonine (with and without augmenting agents such as dexamethasone or epinephrine); tricyclic antidepressants such as amitriptyline or nortryptyline; androgenic steroids such as methyl-testosterone and fluorymesterone; estrogens such as estrone, 17-fl-estradiol, ethinyl estradiol, and diethyl stilbestrol; progestational agents such as progesterone, megestrol, melengestrol, chlormadinone, ethisterone, norethynodrel, 19-norprogesterone, norethindrone, medroxyprogesterone and 17-O-hydroxy-progesterone; humoral agents such as the Prostaglandins, for example PGEI, PGE2 and PGF2; antipyretics such as aspirin, sodium salicylate, and salicylamide; antispasmodics such as atropine, methantheline, papaverine, and methscopolamine bromide; antimalarials such as the 4-aminoquinolines, 8-aminoquinolines, chloroquine, and pyrimethamine; antihistamines such as diphenhydramine, dimenhydrinate, tripelennamine, perphenazine, and chlorphenazine; cardioactive agents such as dibenzhydroflume thiazide, flumethiazide, chlorothiazide, and aminotrate; statins, such as atorvastatin, cerivastatin, fluvastatin, lovastatin, pravastatin, simvastatin, and related compounds; antiasthmatics, such as cromolyn; bone resorption prevention agents, such as bisphosphonates, including as nonlimiting examples alendronate, risendronate, zolendronate, pamidronate, and ibandronate; calcium regulating hormones, such as calcitonin; nutritional agents such as natural and synthetic bioactive peptides; and proteins, including growth factors, cell adhesion factors, cytokines, and biological response modifiers.

In some compositions of the present disclosure, the active pharmaceutical ingredient is capable of treating an eye condition, e.g. it comprises a substance that is capable of treating an eye condition. Such a substance is also known as an ophthalmic drug. In some compositions of the present disclosure, the active pharmaceutical ingredient does not comprise an ophthalmic drug other than sirolimus, and in some aspects the active pharmaceutical ingredient does not comprise an ophthalmic drug.

The active compound is included in the composition in an amount sufficient to deliver to the host human or animal an effective amount to achieve a desired effect. The amount of drug or biologically active agent incorporated into the composition depends upon the desired release profile, the concentration of drug required for a biological effect, and the desired period of release of the drug.

The concentration of active compound in the composition will also depend on absorption, inactivation, and excretion rates of the drug as well as other factors known to those of skill in the art. It is to be noted that dosage values will also vary with the severity of the condition to be alleviated. It is to be further understood that for any particular subject, specific dosage regimens should be adjusted over time according to the individual need and the professional judgment of the person administering or supervising the administration of the compositions, and that the concentration ranges set forth herein are exemplary only and are not intended to limit the scope or practice of the claimed composition. The composition may be administered in one dosage, or may be divided into a number of smaller doses to be administered at varying intervals of time.

The biologically active substance is typically present in amounts and/or concentrations capable of administering effective amounts to a patient in need of the biologically active substance. The amount and/or concentration depends on the biologically active substance used, and can also depend on the situs of administration. The amount and/or concentration of biologically active substance can be determined by a person of ordinary skill using the present specification for guidance. As a general matter, higher concentrations are preferred since this may permit administrations of depots having smaller volumes. Concentrations generally should not be so high that the BAS or other components have a high probability of precipitating since this could affect performance (e.g., bioavailability) and/or have other adverse effects. In the case of some ophthalmic depots, high concentration/low volume is preferred, but precipitation should be avoided since this can affect vision and/or impact bioavailability of the BAS (e.g., sirolimus). Without limiting the disclosure, the biologically active substance is typically present in the present composition in amounts of at least 0.05 wt %, 0.1 wt %, 0.5 wt %, 1 wt %, or 2 wt %, based on weight of the composition. The biologically active substance is typically present in the composition in amounts up to 20 wt %, 10 wt %, 7 wt %, 5 wt %, 4 wt %, or 3 wt %, based on weight of the composition. In some cases, the biologically active substance is present in an amount ranging from about 0.2 wt % to about 10 wt %, such as about 0.2 wt % to about 3.1 wt % or about 0.3 wt % to about 1 wt %, based on weight of the composition. In some cases, the biologically active substance comprises sirolimus present in an amount ranging from 1 wt % to 10 wt %, based on weight of the composition.

Compositions of the present disclosure can include one or more biologically active substance (BAS), API, or active compound. When two or more BASs are used, they can be from the same therapeutic class, or from different therapeutic classes. For example, the active pharmaceutical ingredient may comprise sirolimus and at least one further therapeutic agent, e.g., at least one further ophthalmic drug. Some possible combinations of BASs include sirolimus and tacrolimus; sirolimus and cyclosporine; and sirolimus and prednisolone.

Compositions of the present disclosure preferably comprise a pharmaceutically acceptable high viscosity liquid carrier material (HVLCM), preferably pharmaceutically acceptable for ophthalmic depots. The HVLCM is non-polymeric, non-water soluble, and has a viscosity of at least 5,000 cP, (and optionally at least 10,000; 15,000; 20,000; 25,000; or even 50,000 cP) at 37° C. The HVLCM preferably does not crystallize neat under ambient or physiological conditions of a subject. The term non-water soluble refers to a material that is soluble in water to a degree of less than 1 wt % under ambient conditions, e.g., room temperature or 23° C. The term “non-polymeric” in this context refers to esters or mixed esters having essentially no repeating units in the acid moiety of the ester, as well as esters or mixed esters having acid moieties wherein functional units in the acid moiety are repeated a small number of times (i.e., oligomers). Generally, materials having more than five identical and adjacent repeating units or -mers in the acid moiety of the ester are excluded by the term “nonpolymeric” as used herein, but materials containing dimers, trimers, tetramers, or pentamers are included within the scope of this term.

The HVLCM may comprise, consist essentially of, or consist of, sucrose acetate isobutyrate (“SAIB”). SAIB is an exemplary HVLCM.

The term “SAIB” refers to molecules of sucrose whose eight native hydroxyl groups are each esterified with a —COCH₃ (acetyl) or —COCH(CH₃)₂ (isobutyryl) moiety. SAIB is a commercially available product, sold for example in the form of a mixture of compounds having different patterns of acetyl and isobutyryl substitutions of the native sucrose hydroxyl groups (e.g. differing ratios of acetyl to isobutyryl moieties and/or different ring positions of the acetyl and isobutyryl moieties). A skilled artisan would understand that SAIB typically comprises a mixture of differently-substituted “isoforms,” which includes a sucrose molecule nominally esterified preferably with two acetic acid and six isobutyric acid moieties. Thus, the HVLCM may comprise, consist essentially of, or consist of SAIB in which the native sucrose molecule is esterified with two acetic acid and six isobutyric acid moieties—the structure of which is set forth in U.S. Pat. No. 5,747,058, which is incorporated herein by reference in its entirety.

SAIB is orally non-toxic and is used as to stabilize emulsions in the food industry. It is a very viscous liquid and has an unusual property that there is a dramatic change in viscosity with small additions of heat or with the addition of solvents. It is soluble in a large number of biocompatible solvents. When in solution or in an emulsion, SAIB can be applied via injection or an aerosol spray. SAIB is compatible with cellulose esters and other polymers that can affect the rate of delivery of the substance.

The HVLCM may comprise, consist essentially of, or consist of, nonpolymeric polyalkylene polyol. Non-polymeric polyethylene glycol (PEG) is a preferred polyalkylene polyol. When the HVLCM comprises PEG, the PEG preferably has a molecular weight less than about 220 or 200 daltons. That is, preferably n<5, where n is the average number of ethylene glycol units in the PEG. Preferred values of n for an HVLCM comprising PEG include n=5, 4, 3, or 2.

In other embodiments, the HVLCM can be stearate esters such as those of propylene glycol, glyceryl, diethylaminoethyl, and glycol, stearate amides and other long-chain fatty acid amides, such as N,N′-ethylene distearamide, stearamide MEA and DEA, ethylene bistearamide, cocoamine oxide, long-chain fatty alcohols, such as cetyl alcohol and stearyl alcohol, long-chain esters such as myristyl myristate, beheny erucate, and glyceryl phosphates. The HVLCM may comprise acetylated sucrose distearate (Crodesta A-10).

The HVLCM is present in the composition in any amount that achieves the desired properties, e.g., viscosity and/or cohesiveness. The HVLCM is preferably present in amounts equal to or less than 99.5 wt %, 95 wt %, 85 wt %, 60 wt %, or 50 wt %, based on weight of the pharmaceutical composition. The HVLCM is preferably present in the inventive pharmaceutical compositions in amounts equal to or greater than 0.1 wt %, 0.5 wt %, 1 wt %, 10 wt %, 25 wt %, or 40 wt %, based on weight of the pharmaceutical composition. All ranges formed from combinations of these amounts or amounts disclosed in the Examples, e.g., 0.5 wt % to 50 wt %, 25 wt %-85 wt %, and 10 wt %-40 wt %, are also preferred. In some cases, the HVLCM comprises SAIB present in an amount ranging from about 0.1 wt % to 60 wt %, such as about 0.5 wt % to about 50 wt %, about 30 wt % to about 60 wt %, and about 0.1 wt % to about 10 wt % (e.g. about 0.5 wt % to about 5 wt %), based on weight of the composition.

Compositions of the present disclosure preferably comprise a pharmaceutically acceptable hydrophobic solvent, including those pharmaceutically acceptable for ophthalmic depots. Useful hydrophobic solvents exhibit a solubility in water less than 1 wt %, preferably less than 0.5 wt %, more preferably less than 0.1 wt %. Especially preferred are hydrophobic solvents having a solubility in water less than 0.05 wt %. The solubility is measured at 25° C. Some examples of hydrophobic solvents include benzyl benzoate (BB), isopropyl myristate (IPM), isopropyl palmitate, acetyl trialkyl citrate (e.g., acetyl tributyl citrate (ATBC)), and trialkyl citrate (e.g., tributyl citrate (TBC)). BB and IPM are commercially available products. Benzyl benzoate is a preferred hydrophobic solvent.

Other suitable hydrophobic solvents include triglycerides (e.g., caprylic/capric triglyceride (Miglyol 810)), and dimethyl phthalate, as well as fatty esters and ethers such as ethyl oleate and ethyl caprate.

When used, trialkyl citrate (TAC) may comprise or consist essentially of a compound represented by formula (A) below. In formula (A), R^(a), R^(b) and R^(c) denote the same or different alkyl groups, each having 3 to 5 carbon atoms. The alkyl group is preferably a linear or branched alkyl group, and is more preferably a linear or branched alkyl group having a carbon number of 4. Some preferred trialkyl citrates include those with an n-propyl group, n-butyl group, n-pentyl group, isopropyl group, isobutyl group, sec-butyl group, tert-butyl group, isopentyl group, etc. Trialkyl citrate with three n-butyl groups (referred to herein as tributyl citrate, or TBC) is more preferred.

In Formula (A), R^(a), R^(b) and R^(c) may each be the same, or may be different. Preferably, R^(a), R^(b) and R^(c) are the same.

When used, acetyl trialkyl citrate (ATAC) may comprise or consist essentially of a compound represented by formula (B) below, which is also referred to as trialkyl acetyl citrate and 2-acetoxypropane-1,2,3-trialkyl tricarboxylic acid. In formula (B), R^(a), R^(b) and R^(c) each denote alkyl groups having a carbon number of 3 to 5. The alkyl group is preferably a linear or branched alkyl group, preferably having a carbon number of 4. Some preferred acetyl trialkyl citrates include those with an n-propyl group, n-butyl group, n-pentyl group, isopropyl group, isobutyl group, sec-butyl group, tert-butyl group, isopentyl group, etc. Acetyl trialkyl citrate with three n-butyl groups (referred to herein as acetyl tributyl citrate, or ATBC) is more preferred.

In Formula (B), R^(a), R^(b) and R^(c) may each be the same, or may be different. Preferably, R^(a), R^(b) and R^(c) are the same.

As hydrophobic solvent, TAC or ATAC may be used individually, or in combination with each other. TAC and/or ATAC may also be used in combination with one or more other hydrophobic solvents. When used in combination, any ratio of TAC:ATAC may be used. Some ratios of TAC:ATAC (volume:volume) include 0:100, 0.1:99.9, 5:95, 10:90, 15:85, 30:70, 50:50, 70:30, 85:15, 90:10, 95:5, 99.9:0.1, and 100:0. Ranges formed from any two of these ratios are also preferred.

The compositions of the present disclosure can comprise any amount of hydrophobic solvent to confer suitable properties to the composition. Compositions of the present disclosure, when they comprise hydrophobic solvent, preferably comprise at least 0.1 wt %, 1 wt %, 2 wt %, 10 wt %, 20 wt %, 30 wt %, and 40 wt %. Compositions of the present disclosure, when they comprise hydrophobic solvent, preferably comprise up to 99 wt %, 95 wt %, 90 wt %, 80 wt %, 70 wt %, 60 wt %, and 50 wt %. In some cases, compositions of the present disclosure contain from about 80 wt % to about 95 wt % of hydrophobic solvent, based on weight of the composition. In some cases, the hydrophobic solvent comprises benzyl benzoate in an amount ranging from about 30 wt % to about 60 wt %, or about 35 wt % to about 45 wt %, based on weight of the composition. In other cases, the hydrophobic solvent comprises ATBC in an amount ranging from about 30 wt % to about 60 wt %, or about 35 wt % to about 50 wt %, based on weight of the composition.

Compositions of the present disclosure preferably comprise a pharmaceutically acceptable hydrophilic solvent, including those pharmaceutically acceptable for ophthalmic depots. The hydrophilic solvent, when used, is preferably non-polymeric, e.g., other than polyalkylene glycol or polyethylene glycol. A hydrophilic solvent preferably has a solubility in water at least 1 wt %, 2 wt %, 10 wt %, 25 wt %, 50 wt %, up to and including miscibility with water, when measured at 25° C. When a hydrophobic solvent is used, the hydrophilic solvent exhibits a solubility in water greater than the hydrophobic solvent. Some preferred hydrophilic solvents include ethanol, ethyl lactate (EL), dimethyl sulfoxide (DMSO), N-methyl-2-pyrrolidone (NMP), polyalkylene polyol, ethyl acetate, propylene glycol, propylene carbonate, glycerin, and triacetin (TA).

Commercially available hydrophilic solvents may include minor amounts of water. When it is desired to reduce or eliminate water in the inventive pharmaceutical compositions, it may be advantageous to use anhydrous (or dry) hydrophilic solvent. Hydrophilic solvent can be commercially obtained in anhydrous (or low-hydrous) form, and/or hydrophilic solvent containing water can be dried. These same considerations apply to other components of inventive compositions, as well as to pharmaceutical compositions of the present disclosure. Components that form an azeotrope with water (e.g., ethanol) are preferably used in anhydrous form. Anhydrous ethanol includes, for example, products indicated as 99.5% EtOH, 200 proof, and/or comprising less than 0.005% water.

Ethanol, ethyl lactate, dimethyl sulfoxide, N-methyl-2-pyrrolidone, polyalkylene polyols, and triacetin are all widely commercially available products of commerce. When used, ethanol is preferably not denatured. In some cases, ethanol is present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition (e.g. from about 1 wt % to about 7 wt %, such as about 1 wt % to about 5 wt %).

When a hydrophilic solvent includes polyalkylene polyol, any molecular weight (or degree of polymerization) may be used, with the caveat that in order to act as a hydrophilic solvent, the polyalkylene polyol should be a liquid at ambient temperature, e.g., 23° C. A preferred polyalkylene polyol is polyethylene glycol (PEG). PEG 300 (n about 7), PEG 400 (n about 9), and PEG 600 (n about 13) are liquids at 23° C., while PEG 800 (n about 18) is a paste at 23° C. Preferred PEGs as hydrophilic solvent include PEG 600, PEG 400, and PEG 300, e.g. PEG 400.

When used, hydrophilic solvent is generally present in amounts up to 70 wt %, up to 60 wt %, up to 50 wt %, up to 40 wt %, up to 30 wt %, up to 20 wt %, up to 15 wt %, or up to 10 wt % of the composition. Though there is generally no lower limit, when hydrophilic solvent is used, it is generally present in amounts of at least 0.1 wt %, at least 1 wt %, at least 2 wt %, at least 3 wt %, at least 4 wt %, or at least 5 wt %. In some cases, the hydrophilic solvent comprises ethanol in an amount ranging from about 1 wt % to about 20 wt %, or about 2 wt % to about 10 wt %, based on weight of the composition. In some cases, the hydrophilic solvent comprises PEG in an amount ranging from about 30 wt % to about 60 wt %, or about 40 wt % to about 50 wt %, based on weight of the composition. In some cases, the compositions of the invention may contain both ethanol and PEG, for example in which the amounts of ethanol and PEG, respectively, each fall within the illustrative amounts outlined herein.

It is possible for a PEG of sufficiently low molecular weight (e.g., n<5) to act as both HVLCM and hydrophilic solvent, in which case the total amount may be apportioned among the two components, or may be classified solely with one of the two components.

In some cases, the vehicle formulation comprises SAIB, BB, and ethanol. In some other cases, the vehicle formulation comprises SAIB, BB and ethanol and additional components to provide a formulation with a more desirable release profile. In some cases, the formulation provides reproducible release of sirolimus from a composition administered intraocularly as a single dose to a mammalian subject, e.g., a human subject (or patient)

Compositions of the present disclosure optionally include one or more polymers. Including a polymer can confer beneficial properties to the composition. For example, use of polymer can help to slow API release, helping to give a more sustained release rate. This can help to extend the life of the depot. Reducing the rate of release can also help to control drug exposure, and/or help to control exposure to safe and effective levels, and/or eliminate or reduce overexposure.

Some preferred polymers include poloxamer, polyalkylene polyol, poly(lactic acid)(glycolic acid), poly(lactic acid) (or polylactides), polycaprolactone, polyglycolides, polycaprolactones, polyanhydrides, polyamines, polyurethanes, polyesteramides, polyorthoesters, polydioxanones, polyacetals, polyketals, polycarbonates, polyphosphoesters, polyoxyesters, polyorthocarbonates, polyphosphazenes, succinates, poly(malic acid), poly(amino acids), polyvinylpyrrolidone, polyethylene glycol, polyhydroxycellulose, chitin, chitosan, hyaluronic acid, and copolymers, terpolymers and mixtures thereof. Polymers that are liquid at room temperature, or that are soluble in the disclosed compositions at room temperature, are preferred.

Poloxamers are nonionic triblock copolymers comprising a central hydrophobic chain of polyoxypropylene (poly(propylene oxide)) with two hydrophilic chains of polyoxyethylene (poly(ethylene oxide)). Poloxamers are commercially available and sold under various trade names such as SYNPERONICS, PLURONICS, and KOLLIPHOR. Any suitable grade may be used, with poloxamer P188 being preferred.

When a polymer includes polyalkylene polyol, any molecular weight (or degree of polymerization) may be used, with the caveat that in order to act as a polymer in the present disclosure rather than the HVLCM, the polyalkylene polyol should have a degree of polymerization greater than 5 (that is, n>5). A preferred polyalkylene polyol is polyethylene glycol (PEG). PEG 300 (n about 7), PEG 400 (n about 9), and PEG 800 (n about 18) are preferred as such a polymer.

It is possible for a PEG of suitable molecular weight to act as both polymer (e.g., n>5) and hydrophilic solvent (e.g., n<18), in which case the total amount may be apportioned among the two components, or may be classified solely with one of the components.

Polylactides are lactic acid-based polymers that can be based solely on lactic acid or can be a copolymer, e.g., based on lactic acid, glycolic acid and/or caprolactone, which may include small amounts of other co-monomers that do not substantially affect the advantageous results that can be achieved in accordance with the present disclosure. As used herein, the term “lactic acid” includes the isomers L-lactic acid, D-lactic acid, DL-lactic acid and lactide, while the term “glycolic acid” includes glycolide. Most preferred are one or more of the following polymers: polylactide polymers, commonly referred to as PLA; poly(lactide-co-glycolide)copolymers, commonly referred to as PLGA; and poly(caprolactone-co-lactic acid) (PCL-co-LA). The polymer may have a monomer ratio of lactic acid/glycolic acid of from about 100:0 to about 10:90, such as 100:0 to 15:85, preferably from about 75:25 to about 30:70, more preferably from about 60:40 to about 40:60, and an especially useful copolymer has a monomer ratio of lactic acid/glycolic acid of about 50:50.

The poly(caprolactone-co-lactic acid) (PCL-co-LA) polymer preferably has a co-monomer ratio of caprolactone/lactic acid of from about 10:90 to about 90:10, from about 50:50; preferably from about 35:65 to about 65:35; and more preferably from about 25:75 to about 75:25. In certain embodiments, the lactic acid-based polymer may comprise a blend of about 0% to about 90% caprolactone, about 0% to about 100% lactic acid, and about 0% to about 60% glycolic acid.

Other suitable polymers include PEG-PLGA, poly(vinyl alcohol), and poly(ortho ester).

The polymer may have an average molecular weight of from about 1,000 to about 120,000, such as from about 5,000 to about 50,000 or about 8,000 to about 30,000, as determined by gel permeation chromatography (GPC). For instance, the lactic acid-based polymer preferably has an average molecular weight of from about 1,000 to about 120,000, preferably from about 5,000 to about 50,000, more preferably from about 8,000 to about 30,000, as determined by gel permeation chromatography (GPC). As indicated in U.S. Pat. No. 5,242,910, the polymer can be prepared in accordance with the teachings of U.S. Pat. No. 4,443,340. Alternatively, the lactic acid-based polymer can be prepared directly from lactic acid or a mixture of lactic acid and glycolic acid (with or without a further co-monomer) in accordance with the techniques set forth in U.S. Pat. No. 5,310,865. The contents of all of these patents are incorporated by reference. Suitable lactic acid-based polymers are available commercially. For instance, 50:50 lactic acid:glycolic acid copolymers having molecular weights of 8,000, 10,000, 30,000 and 100,000 are available from Boehringer Ingelheim Chemicals, Inc. (Petersburg, Va.), Medisorb Technologies International L.P. (Cincinnati, Ohio) and Lactel Absorbable Polymers (formerly Birmingham Polymers, Inc.) as described below.

Examples of suitable lactide polymers include, but are not limited to, poly (D,L-lactide) RESOMER L104, PLA-L104, poly (D,L-lactide-co-glycolide) 50:50 RESOMER RG502, poly (D,L-lactide-co-glycolide) 50:50 RESOMER RG502H, poly (D,L-lactide-co-glycolide) 50:50 RESOMER RG503, poly (D,L-lactide-co-glycolide) 50:50 RESOMER RG506, poly L-lactide MW 2,000 (RESOMER L 206, RESOMER L 207, RESOMER L 209, RESOMER L 214); poly D,L-lactide (RESOMER R 104, RESOMER R 202, RESOMER R 203, RESOMER R 206, RESOMER R 207, RESOMER R 208); poly L-lactide-co-D,L-lactide 90:10 (RESOMER LR 209); polyglycolide (RESOMER G 205); poly D,L-lactide-co-glycolide 50:50 (RESOMER RG 504H, RESOMER RG 504, RESOMER RG 505); poly D-L-lactide-co-glycolide 75:25 (RESOMER RG 752, RESOMER RG755, RESOMER RG 756); poly D,L-lactide-co-glycolide 85:15 (RESOMER RG 858); and poly L-lactide-co-trimethylene carbonate 70:30 (RESOMER LT 706) (Boehringer Ingelheim Chemicals, Inc., Petersburg, Va.).

Additional examples include, but are not limited to, DL-lactide/glycolide 100:0 (MEDISORB Polymer 100 DL High, MEDISORB Polymer 100 DL Low); DL-lactide/glycolide 85/15 (MEDISORB Polymer 8515 DL High, MEDISORB Polymer 8515 DL Low); DL-lactide/glycolide 75/25 (MEDISORB Polymer 7525 DL High, MEDISORB Polymer 7525 DL Low); DL-lactide/glycolide 65/35 (MEDISORB Polymer 6535 DL High, MEDISORB Polymer 6535 DL Low); DL-lactide/glycolide 54/46 (MEDISORB Polymer 5050 DL High, MEDISORB Polymer 5050 DL Low); and DL-lactide/glycolide 54/46 (MEDISORB Polymer 5050 DL 2A(3), MEDISORB Polymer 5050 DL 3A(3), MEDISORB Polymer 5050 DL 4A(3)) (Medisorb Technologies International L.P., Cincinnati, Ohio); and Poly D,L-lactide-co-glycolide 50:50; Poly D,L-lactide-co-glycolide 65:35; Poly D,L-lactide-co-glycolide 75:25; Poly D,L-lactide-co-glycolide 85:15; Poly DL-lactide; Poly L-lactide; Poly glycolide; Poly .epsilon.-caprolactone; Poly DL-lactide-co-caprolactone 25:75; and Poly DL-lactide-co-caprolactone 75:25 (Birmingham Polymers, Inc., Birmingham, Ala.).

Polymer may be present in amounts up to 40 wt %, 30 wt %, 20 wt % or 10 wt % of the pharmaceutical composition. When used, polymer may be present in amounts of at least 0.1 wt %, 1 wt %, 2 wt %, 3 wt %, 4 wt %, or 5 wt % of the pharmaceutical composition.

Poloxamers, such as disclosed above, have surfactant properties. Compositions of the present disclosure can optionally comprise one or more surfactants. Surfactants may be particularly useful in compositions having both hydrophilic and hydrophobic components (e.g., ethanol and either SAIB or a hydrophobic solvent). Any surfactant suitable for use in a depot formulation, e.g., an ophthalmic depot formulation, can be used. Non-ionic surfactants are preferred for ophthalmic compositions. Some suitable surfactants include, e.g., poloxamer, polyethoxylated castor oil, polyoxyethylated hydroxystearic acid, propylene glycol fatty esters, and sorbitan fatty esters. Poloxamers are preferred. In some cases, poloxamer is present in an amount ranging from 0.1 wt % to about 5 wt %, based on weight of the composition.

Some polyethoxylated castor oils include polyoxyl 5 castor oil, polyoxyl 9 castor oil, polyoxyl 15 castor oil, polyoxyl 35 castor oil, polyoxyl 40 castor oil, polyoxyl 40 hydrogenated castor oil, and polyoxyl 60 hydrogenated castor oil. Some preferred polyethoxylated castor oils include polyoxyl 35 castor oil (e.g., KOLLIPHOR EL), polyoxyl 40 hydrogenated castor oil (e.g., CREMOPHOR RH40), and polyoxyl 60 hydrogenated castor oil (e.g., CREMOPHOR RH60) available from BASF Corporation of Midland, Mich.

Polyoxyethylated stearic acid includes polyoxyethylene stearates, also known as macrogol stearates, comprise a series of polyethoxylated derivatives of stearic acid. They generally include polyethylene glycol stearates and polyethylene glycol distearates. Some polyethoxylated stearic acids suitable for use in the present disclosure include polyoxyl 2 stearate, polyoxyl 4 stearate, polyoxyl 6 stearate, polyoxyl 8 stearate, polyoxyl 12 stearate, polyoxyl 20 stearate, polyoxyl 2 stearate, polyoxyl 30 stearate, polyoxyl 40 stearate, polyoxyl 50 stearate, polyoxyl 100 stearate, polyoxyl 2 stearate, polyoxyl 150 stearate, polyoxyl 4 distearate, polyoxyl 8 distearate, polyoxyl 12 distearate, polyoxyl 32 distearate, and polyoxyl 150 distearate. Macrogol stearates are commercially available from several suppliers, under trade names including MYRJ (Croda), HODAG (Calgene) KESSCO (Stepan Co.) and PROTAMATE (Protameen Chemicals).

Other suitable surfactants include polysorbate 80 (Tween 80), Solutol HS-15, d-tocopheryl polyethylene glycol 1000 succinate (TPGS), Polyoxyl 8 stearate (PEG 400 monosterate), and Polyoxyl 40 stearate (PEG 1750 monostearate).

Fatty acid esters are suitable surfactants. Among these, propylene glycol fatty acid esters and sorbitan fatty acid esters are suitable nonionic surfactants, and include mono-esters, sesqui-esters, and di-esters. Sorbitan fatty acid esters may further include tri-esters. The fatty acid portion of these esters are typically C₁₂-C₁₈. Preferred fatty acid portions include stearate, isostearate, laurate, palmitate and oleate. Some preferred esters include sorbitan monooleate, propylene glycol monolaurate and sorbitan monolaurate.

Fatty acid esters (preferably C₁₂-C₁₈) of carboxylic acids are also preferred. These include esters of lactic acid, malic acid, adipic acid, and myristic acid. Some suitable surfactants include Ceraphyl 31 (lauryl lactate ester, Ashland Inc.), Labrafac PG (propylene glycol dicaprylate/dicaprate NF, Gattefosse), and Lauroglycol 90 (Propylene glycol monolaurate (type II) EP/NF; Gattefosse).

Other suitable surfactants include PEG 300 caprylic/capric glycerides (Softigen 767), PEG 300 linoleic glycerides (Labrafil M-2125CS), Glyceryl monooleate (PECEOL), Propylene glycol monolaurate (Lauroglycol FCC).

When a surfactant is used, any suitable amount may be used. Pharmaceutical compositions of the present disclosure may comprise up to 50 wt % surfactant, up to 40 wt % surfactant, up to 30 wt % surfactant, up to 20 wt % surfactant, up to 10 wt % surfactant, up to 5 wt % surfactant, up to 4 wt % surfactant, up to 3 wt % surfactant, up to 2 wt % surfactant, up to 1.5 wt % surfactant, or up to 1 wt % surfactant, based on weight of the composition. Pharmaceutical compositions of the present disclosure comprising surfactant will typically comprise at least 0.01 wt % surfactant, at least 0.1 wt % surfactant, at least 0.2 wt % surfactant, at least 0.4 wt % surfactant, at least 0.6 wt % surfactant, or at least 0.8 wt % surfactant, based on weight of the composition. For example, the amount of surfactant may be from 0.01 wt % to 5 wt %, from 0.2 wt % to 3 wt %, or from 0.6 wt % to 2 wt %.

Some of these excipients have multiple functions, e.g., as hydrophobic solvents and/or surfactants. When a component has multiple functions, e.g., a macromolecule having surfactant properties (e.g., poloxamer, polyethoxylated castor oil, etc.) the component can be apportioned among the functions, e.g., surfactant and polymer components, or can be classified solely with one of the components.

Compositions of the present disclosure optionally comprise at least one antioxidant, preferably an antioxidant suitable for use in ophthalmic depots. Antioxidants are especially preferred when the depot may be subject to oxidation at the situs of administration. For example, a vitreal depot may be exposed to light, and may therefore be subject to photo-initiated free radical formation, such that it may be preferable to include an anti-oxidant capable of neutralizing free radicals. In such embodiments, the at least one antioxidant preferably comprises a tocopherol, a tocotrienol, or combinations thereof. The antioxidant is preferably soluble in the compositions of the present disclosure. Other suitable antioxidants may include one or more of glutathione, lipoic acid, uric acid, carotenes (e.g., vitamin A and its derivatives and analogs), melatonin, ubiquinol (coenzyme Q), ascorbic acid, sodium thiosulfate, cysteine, sodium edetate, ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), propyl gallate, monothioglycerol, tert-butylhydroquinone (TBHQ), and potassium metabisulfite. Tocopherols and their derivatives and analogues are preferred, of which vitamin E is preferred. Vitamin E includes all forms of tocopherol with antioxidant properties, and includes vitamin E acetate, α-tocopherol and γ-tocopherol; and includes D-, L-, and DL-forms, such as DL-α-tocopherol.

When an antioxidant, e.g., a tocopherol, is used, it can be present in any amount that will confer useful antioxidant properties to the composition for a suitable period of time. A preferred period of time is for the shelf life of the product, e.g., up to its expiration date. Preferred periods of time include 3 months, 6 months, 12 months or 1 year, 18 months or 1.5 years, 24 months or 2 years, 30 months or 2.5 years, 3 years, and 4 years.

When used, the antioxidant is preferably present in an amount up to 50 wt %, 10 wt %, 5 wt %, 1 wt %, 0.1 wt %, or 0.01 wt % based on weight of the composition. Preferred ranges include those formed from these values and/or values in the Examples. In some cases, vitamin E is present in an amount ranging from 0.1 wt % to 5 wt %, based on weight of the composition. It was surprisingly found that the vitamin E is effective at even lower concentrations. Reducing the amount of vitamin E is often beneficial because vitamin E degrades relatively slowly in the vitreous humor. It was surprisingly found that lowering the amount of vitamin E also increases the relative amount of degradation of the vitamin E in some cases. As a result, in some cases the vitamin E is present in an amount ranging from about 0.01 wt % to about 5 wt %, such as about 0.01 wt % to about 1.5 wt %, about 0.02 wt % to about 1 wt %, and about 0.02 wt % to about 0.09 wt %, based on the weight of the composition. In some cases, the composition comprises less than 1 wt % vitamin E, such as 0.5 wt % or less vitamin E, or less than 0.1 wt % vitamin E, based on weight of the composition.

When used in an ophthalmic depot formulation, the HVLCM, preferably SAIB, appears to have several unexpected beneficial properties. While the HVLCM, e.g., SAIB, regulates viscosity and/or cohesiveness of the depot, its presence also contributes to an extended intra-vitreous release profile, over which the density of the depot can remain such that it does not float. Including at least about 0.5 wt % of the HVLCM can be particularly advantageous.

In a preferred embodiment, the HVLCM significantly decreases in viscosity when mixed with a solvent to form a low viscosity liquid carrier vehicle that can be combined with an API to form a pharmaceutical composition. The low viscosity pharmaceutical composition is typically easier to place in the body than a high viscosity composition, because, for example, it flows more easily into and out of syringes or other implantation means. The pharmaceutical composition can have any desired viscosity. It has been found that a viscosity range for the pharmaceutical composition of less than approximately 400 cP, and more particularly less than 200 cP, less than 100 cP, less than 50 cP, or less than 25 cP, at 25° C. and 1 atmosphere, is typically useful for in vivo applications. Though there is no lower target viscosity, the viscosity will generally be at least 1 cP, at least 2 cP, at least 4 cP, at least 6 cP, at least 8 cP, at least 10 cP, or at least 15 cP, at 25° C. and 1 atmosphere.

In compositions comprising SAIB and vitamin E (VE), any weight ratio of SAIB:VE can be used that provides a safe and effective composition. In some aspects of the present invention, the weight ratio of SAIB:VE can be chosen to control the density of the composition (density prior to use, upon injection, and long-term (e.g., at 1, 2, 4, 6 or 12 months)). For example, in an ophthalmic depot composition comprising SAIB and VE, the weight ratio SAIB:VE can be 10, 7.5, 5, 3, 2, 1, 0.8, 0.6, 0.5, 0.4, 0.3, or 0.2. Each of these values can be an open or closed upper or lower limit on the ratio of SAIB:VE (e.g., “at least 1,” or “less than 1”). Suitable ranges (with open or closed endpoints) of the weight ratio of SAIB:VE include ranges formed from any pair of these values. For example, the weight ratio of SAIB:VE can be 0.5-10, 0.5-5, 0.5-2, or 1-3. One way to select a SAIB/VE ratio is to assume the composition does not contain any other excipient which can remain in the vitreous (e.g., so that the composition does not float in the vitreous). In some cases, the weight ratio of HVLCM (e.g., SAIB) to vitamin E is such that the density, at 25° C. and 1 atm, of a mixture consisting of said HVLCM and said vitamin E in said weight ratio is at least 1 g/mL, such as at least 1.05 g/mL. In some cases, the composition has a density at 25° C. and 1 atmosphere ranging from 1.02 g/mL to 1.15 g/mL.

In some cases it may be advantageous for a pharmaceutical composition to have low peroxide content, since peroxides are known potent oxidizing agents, and can lead to chemical instability. It may be advantageous in such cases to prepare pharmaceutical compositions from components that have low peroxide content. It is known that a SAIB manufacturing process can lead to peroxide production. When a low peroxide pharmaceutical composition comprising SAIB is required or desired, it may be advantageous to use a low-peroxide SAIB. Low peroxide SAIB is disclosed in U.S. patent publication 2012/0330005, the disclosure of which is incorporated herein by reference in its entirety.

When light encounters a material, they can physically interact with each other in several different ways. These interactions depend on the nature of the light (its wavelength, frequency, energy, etc.) and the nature of the material. Light waves generally interact with an object by some combination of e.g., absorption, reflection, and transmittance/refraction. Transparency is the physical property of allowing light to pass non-diffusively through a material. Translucency refers to the property of allowing light to pass diffusively through a material. Opacity refers to the property of not permitting light to pass through a material. An optically transparent material allows much of the light that falls on it to be transmitted, with little light being diffused, reflected or absorbed. Materials that do not allow the transmission of light are called opaque.

In certain aspects of the present disclosure, such as intravitreal depots, optical transparency of the pharmaceutical composition is a beneficial and preferred property. In other aspects, the pharmaceutical composition is preferably translucent or opaque. When optical transparency is desired, compositions of the present disclosure may non-diffusively transmit at least about 75% of the light, about 80% of the light, about 85% of the light, about 90% of the light, about 95% of the light. Compositions of the present disclosure may non-diffusively transmit up to 100% of the light, 99% of the light, 98% of the light, 97% of the light, or 96% of the light. The percentage of light non-diffusively transmitted may be measured at specific frequencies (e.g., 420-440 nm, 535-555 nm, and/or 565-580 nm), or averaged across the visible spectrum.

The compositions of the present disclosure may be sterile filtered.

Compositions of the present disclosure may be stored under various conditions. For instance, compositions of the present disclosure may be stored at a temperature ranging from about 0° C. to about 30° C., such as about 2° C. to about 25° C., about 4° C. to about 20° C., about 5° C. to about 15° C., or about 7° C. to about 10° C. It is surprising that compositions of the present disclosure are typically relatively stable and typically may be stored two years or longer at 2° C. to about 30° C., such as at about 5° C. or about 25° C. The compositions of the present disclosure may be stored in various containers, e.g., glass containers.

Compositions of the present disclosure may be used to treat any condition treatable with a topical composition or liquid depot. Ophthalmic conditions that may be treatable with sirolimus include conditions disclosed in U.S. Pat. No. 8,367,097, which is incorporated by reference herein in its entirety. The depot formulation of the present disclosure may be useful as a medicine, e.g., for eye diseases, e.g., age-related macular degeneration, retinopathia diabetica, prematurity retinopathy, occlusion of retinal vein, occlusion of retinal artery, polypoidal choroidal vasculopathy, retinal angiomatous proliferation, myopic choroidal neovascularization, diabetic macular edema, eye tumor, radiation retinopathy, rubeosis iridis, rubeotic glaucoma, proliferative vitreoretinopathy (PVR), primary open-angle glaucoma, secondary open-angle glaucoma, normal tension glaucoma, hypersecretion glaucoma, primary angle-closure glaucoma, secondary angle-closure glaucoma, plateau iris glaucoma, combined mechanism glaucoma, developmental glaucoma, steroid induced glaucoma, exfoliation glaucoma, amyloidotic glaucoma, rubeotic glaucoma, malignant glaucoma, glaucoma capsulare of crystalline lens, plateau iris syndrome, hypertonia oculi, uveitis, intraocular infection, etc. As the disease, it can more preferably be used as a preventative or therapeutic agent for age-related macular degeneration, diabetic retinopathy, primary open-angle glaucoma, normal tension glaucoma, primary angle-closure glaucoma, ocular hypertension, uveitis, intraocular infection, etc. Preferred conditions include uveitis, wet and dry age-related macular degeneration (AMD), diabetic macular edema (DME), diabetic retinopathy (DR) and keratomycosis.

Where a composition is said to be one “consisting essentially of” a given listing of specified components, this may indicate that the composition either consists of the specified components or comprises both the specified components and one or more unspecified components provided that the one or more unspecified components do not render the composition unsuitable for its intended use. For instance, for such a composition that comprises a given active pharmaceutical ingredient suitable for treating a given condition, the one or more unspecified components may be present provided that they do not render the composition unsuitable for treating the said condition. Typically, in a composition “consisting essentially of” a given listing of specified components, the total amount by weight, based on weight of the composition, of any components other than the specified components is not more than 20 wt %, preferably not more than 10 wt %, more preferably not more than 5 wt % and most preferably not more than 2 wt %.

After the compositions of the present disclosure are placed in a liquid media (e.g., in vitro or in vivo), the volume of the compositions of the present disclosure reduce in size with time.

After the compositions of the present disclosure are placed in a liquid media, the active pharmaceutical ingredient, e.g., sirolimus, in the compositions of the present disclosure often does not precipitate. The lack of precipitation may be beneficial if the composition is used in the eye because precipitation may interfere with vision. The lack of precipitation may be beneficial in some cases because it minimizes irritation. The lack of precipitation over time is surprising.

The compositions of the present disclosure may be contained within a vial. The volume of composition contained within a vial may range, e.g., from about 35 μL to about 1000 μL, such as about 40 μL to about 900 μL, about 45 μL to about 800 μL, about 50 μL to about 700 μL, about 55 μL to about 600 μL, about 60 μL to about 500 μL, about 65 μL to about 400 μL, about 70 μL to about 300 μL, about 75 μL to about 200 μL, about 80 μL to about 100 μL, and about 300 μL to about 500 μL.

When used ophthalmically, the compositions of the present disclosure may be applied as vitreous and/or subconjunctival depots.

Typically, the composition will be injected from a standard hypodermic syringe, a catheter or a trocar, that has been pre-filled with the pharmaceutical composition. It is often preferred that injections take place using the smallest size needle (i.e., smallest diameter) or catheter to reduce discomfort to the subject when the injection is in ophthalmic, subcutaneous, intramuscular, intravascular (high/low flow), intramyocardial, adventitial, intratumoral, or intracerebral portion, wound sites, tight joint spaces or body cavity of a human or animal. In some cases, the administration comprises intravitreal injection and/or subconjunctival injection. Any needle or catheter size appropriate for the injection site may be used. A higher gauge size is generally preferred (e.g., in order to reduce pain or damage). However, an excessively high gauge may result in complications, such as prolonged injection times or increased injection force due to capillary action and/or viscosity. It is desirable to be able to inject the pharmaceutical composition through a needle or a catheter ranging from 16 gauge and higher, 20 gauge and higher, 22 gauge and higher, 24 gauge and higher, 25 gauge and higher, 26 gauge and higher, 27 gauge and higher, 28 gauge and higher, or 29 gauge and higher. The needle or catheter will typically be 34 gauge and lower, 33 gauge and lower, 32 gauge and lower, 31 gauge and lower, or 30 gauge and lower. For instance, the gauge may range from 23 to 32, such as 27 to 30.

When a syringe is used, any needle length appropriate for the injection site can be used. The needle is preferably long enough to permit the tip to effectively reach the target depot site. The needle is preferably short enough for the operator (e.g., physician or nurse), to maintain control over the syringe and/or injection procedure. For ophthalmic depots, a needle can be at least 0.5 cm, 1 cm, 1.5 cm, or 2 cm in length. For ophthalmic depots, a needle can be up to 4 cm, 3 cm, or 2.5 cm in length.

A person of ordinary skill in the art can determine an appropriate needle size (e.g., gauge and/or length) using the present specification as a guide.

The syringe should be made of a material which is compatible with the composition that it contains. For instance, the syringe may comprise glass or a polymer (e.g., cyclic olefin polymer, cyclic olefin copolymer, and polypropylene). The syringe may comprise a metal plunger, such as a stainless steel plunger. In some cases, the syringe is a leur-lock syringe. In some cases, the syringe is contained within a receptacle, such as a box.

The volume of composition contained within a syringe may range, e.g., from about 5 μL to about 100 μL, such as about 5 μL to about 75 about 10 μL to about 50 μL, about 15 μL to about 40 μL, and about 20 μL to about 30 Accordingly, the injection volume often ranges from about 5 μL to about 100 μL, about 10 μL to about 75 μL, about 15 μL to about 50 μL, and about 20 μL to about 40 μL, and may be less than about 50 μL. It is surprising that such small injection volumes may provide an effective dose.

The release profile and duration of effect of the present compositions are surprising. In some cases, the amount of active pharmaceutical ingredient released within 3 months of dosing is about 30% to about 70%, such as about 40% to about 60% or about 50%, of the total amount of active pharmaceutical ingredient initially dosed in the composition. In some cases, when the composition is administered intra-ocularly as a single dose to a human patient and a median amount of pharmaceutical active ingredient released from the composition (1) at 1 month after administration ranges from 1% to 20% or 2% to 15% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration; (2) at 3 months after administration to a human patient ranges from 10% to 60% or 20% to 50% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration; and (3) at 6 months after administration ranges from 30% to 100% or 40% to 90% of a total amount of the pharmaceutical active ingredient in the composition at the time of administration. In some cases, the release rate of active pharmaceutical ingredient from the composition ranges from about 1 μg/day to about 30 μg/day, such as about 2 μg/day to about 20 μg/day or about 5 μg/day to about 15 μg/day.

In the case of successively administering the depot formulation of the present disclosure, there is no particular limitation in dosage interval so long as the interval is sufficient to exert the desired drug efficacy; however, being administered at an interval of once in 3 days to once in 5 years may be preferable, such as once a month to once every 9 months, or once every 6 months to once every 8 months. For instance, the composition may be administered at an interval of once in 3 days, once in 5 days, once in 1 week, once in 2 weeks, once in 1 month, once in 2 months, once in 3 months, once in 4 months, once in 5 months, once in 6 months, once in 7 months, once in 8 months, once in 9 months, once in 1 year, once in 2 years, once in 3 years, once in 4 years or once in 5 years may be preferable, and being administered at an interval of once in 2 months, once in 3 months, once in 4 months, once in 5 months, once in 6 months or once in 1 year is often preferable. In addition, the dosage interval can be changed as appropriate.

EXAMPLES

Materials cited in the examples below are commercially available from a number of sources. Some commercial suppliers are disclosed herein. Other commercial suppliers may be available for the products. Naming a possible commercial supplier of a product does not in any way limit the present disclosure.

Polymers (PLGA: dodecanol initiated, L/G 85/15, MW 13.9 KDa), (PLA: dodecanol initiated, MW 13.9 KDa) and (polycaprolactone PCL: dodecanol initiated MW 95.3 KDa) are commercially available as LACTEL brand from Durect Corporation. SAIB was obtained from Durect Corporation.

Solvents include benzyl alcohol (BA), benzyl benzoate, propylene glycol, and dehydrated undenatured 200 proof ethanol, USP grades, such as commercially available from Spectrum Chemicals. N-methyl-2-pyrrolidone (NMP) is commercially available from ISP. Super Refined PEG 400-LQ-(MH) is commercially available from CRODA, and dimethyl sulfoxide (DMSO) is commercially available from Gaylord. Castor oil is commercially available from Spectrum Chemicals. KolliSolve® GTA (Triacetin) is commercially available from BASF, and triethyl citrate (TEC) 99% is commercially available from Sigma Aldrich. High purity acetyl tributyl citrate (ATBC) NF, USP Grade is commercially available from Mutchler Inc.

Synperonic PE/F68-FL-CQ (Poloxamer 188) is commercially available from CRODA. Dulbecco's phosphate buffered saline (PBS), hyaluronic acid (HA) and sodium dodecyl sulfate (SDS), commercially available from Sigma-Aldrich, are used in release media preparation.

Vitamin E (DL-α-tocopherol) is commercially available from BASF.

Sirolimus is commercially available from Althea through Santen Pharmaceutical Company.

Example 1

Referring to Tables 1 and 2 below, the solubility of sirolimus was tested at room temperature in solvents and in mixtures of benzyl benzoate and ethanol.

TABLE 1 Solubility of Sirolimus in Aqueous Media and Solvents at Ambient Temperature Medium/Solvent Solubility, mg/mL PBS, pH 7.4 Not detected PBS, 0.1% SDS, pH 7.4 0.23 PEG 400 10.7 Benzyl alcohol (BA) ≥387 N methyl-2 Pyrrolidone (NMP) ≥284 Dimethyl sulfoxide (DMSO) ≥243 Propylene glycol 11.8 Castor oil 3.0 Ethanol (EtOH) 48.5 Benzyl benzoate (BB) 37.0

TABLE 2 Solubility of Sirolimus in Benzyl Benzoate/Ethanol BB/EtOH Ratio Solubility, mg/mL 7 162.9 9 125.2 16 90.1 18 85.6

Referring to Table 4 below, sirolimus (SRL) was dissolved in various solvents and concentration tested after 8 days at room temperature. Samples were protected from light but were exposed to ambient humidity.

Chemical Stability Testing:

About 2 mL of sirolimus formulations were placed in respective 2 mL crimp sealed glass vials under ambient humidity and stored at 5° C. and 25° C. protected from light exposure. Samples were analyzed by HPLC to determine sirolimus concentration. HPLC instrument and parameters were as follows:

Column Oven Agilent 1100 Thermostatted Column Compartment Pump Agilent 1100 Quaternary gradient pump with built in Vacuum Degasser Detector Agilent 1100 UV or Diode Array Detector Refrigerated Agilent 1100 Auto sampler Column YMC ODS-AQ, 4.6 × 250 mm Mobile Phase: A: 20 mM ammonium formate at pH 4.0 B: Acetonitrile

Gradient Table Time, minutes 0 18 40 45 50 51 60 % B 65 65 70 90 90 65 65 Flow Rate, mL/min 0.5 0.5 1.0 1.0 1.0 0.5 0.5 Detection: λ=276 nm Column Temperature: 50° C.

Preparation of Sirolimus Solution Formulations:

Polymers, at the weight ratios shown in Table 5, were dissolved in solvents/mixture of solvents and mixed until uniform. SAIB, at the weight ratios shown in Table 5, was added to polymer/solvent solutions and mixed at 50° C. until a uniform solution was formed. Sirolimus at 3 wt % to 5 wt % concentration was dissolved in each vehicle.

In Vitro Drug Release Testing:

Between 50-100 μL sirolimus formulation was injected in 5 mL release medium (PBS including 0.1% SDS or 0.05% HA) equilibrated at 37° C. Samples were placed on an orbital shaker rotating at 30 rpm or 50 rpm at 37° C. Sampling was conducted by withdrawing the entire release medium at different time points (e.g. 1, 4, 8, 24 hrs and up to 50 days for some formulations) and replacing with a fresh release medium solution equilibrated at 37° C. Care was taken not to touch the drug depot during sampling. Samples were analyzed by HPLC to determine concentration of sirolimus.

Example 1 Results:

Solubility of Sirolimus in Aqueous Media and Solvents:

Addition of 0.1% SDS enhances the aqueous solubility of sirolimus in PBS (Table 1). Solubility of Sirolimus increased in mixtures of benzyl benzoate/ethanol compared with solubility in benzyl benzoate or ethanol. As seen in Table 2, the highest solubility was observed when the ratio of benzyl benzoate/ethanol was 7.

Chemical Stability of Sirolimus in Release Testing Media and Compatibility with Solvents:

Table 3 shows the stability in PBS containing 0.1% SDS for use as the release medium for drug release testing. Compatibility of solvents with sirolimus was tested. Table 4 shows sirolimus recovery after storage in solvents at room temperature.

TABLE 3 Chemical Stability of Sirolimus in Drug Release Testing Medium at 37° C. % Drug Remained Time, Concentration, % Drug including all Buffer Days μg/mL Remained Deg Peaks PBS, 0.1% T0 5.44 — — SDS 4 4.47 82.2 93.8 PBS, 0.1% T0 5.72 — — SDS, 0.01% 4 4.70 82.1 90.6 BHT

TABLE 4 Chemical Stability of Sirolimus in Solvents % SRL Recovered Theoretical Concentration Based on Concentration, mg/mL, Theoretical Solvent mg/mL 8 days at RT Concentration Ethanol (EtOH) 27.7 28.2 101.8 PEG 400 Solubility 10.7 104.9¹ sample with excess solid Benzyl benzoate 22.1 22.3 101.8 (BB) Benzyl alcohol 43.1 42.3 98.1 (BA) N-methyl-2- 32.9 30.3 92.1 pyrrolidone (NMP) Dimethyl 30.3 30.9 101.9 sulfoxide (DMSO) ¹Based on T0 assayed value

Evaluation of Prototype Formulations:

Sirolimus solution formulations had low viscosity (injectable through 27 G and 30 G needles). In vitro drug release testing in PBS, 0.1% SDS showed drug release for >50 days at 37° C. (FIGS. 1a, 1b, and 1c ) and >18 days in HA, FIG. 2 (tested only for composition C115). In FIG. 1, composition C105b used vehicle V105, but had a sirolimus concentration of 4.5 wt %.

Table 6 data indicates that sirolimus was stable in the formulations exposed to ambient humidity for minimum of 2 months at 25° C. and 5° C., except for formulations containing NMP (C107, C108, and C110). Storage at 25° C. and 5° C. is preferred condition for commercial products. For preferred composition of the present disclosure, there is no need to store sirolimus formulations under inert conditions and/or at sub-zero temperatures.

The vehicles and pharmaceutical compositions listed in below Tables 5 and 6 were made.

TABLE 5 Vehicles Comprising SAIB Vehicle Formulations Composition of Vehicles (Parts by Weight) V101 SAIB/BA/PLA (10/80/10) V102 SAIB/BA/BB/PLA (10/40/40/10) V103 SAIB/BB/EtOH/PLGA (10/70/10/10) V104 SAIB/BA/PLGA (10/80/10) V105 SAIB/BA/BB/PLGA (10/40/40/10) V106 SAIB/BA/PLA (10/70/20) V107 SAIB/NMP/PLA (10/70/20) V108 SAIB/PEG 400/NMP/PLA (10/20/50/20) V109 SAIB/PEG 400/BA/PLA (10/20/50/20) V110 SAIB/PG/NMP/PLA (10/20/50/20) V111 SAIB/PG/BA/PLA (10/20/50/20) V112 SAIB/BA/BB/PLA (10/60/10/20) V113 SAIB/NMP/BA/PLA(10/40/30/20) V114 SAIB/BA/PCL (10/85/5) V115 SAIB/BB/PEG400/EtOH/PLA(10/40/43/2/5 V116 SAIB/BB/EtOH (50/45/5) V117 SAIB/BB/DMSO/PLGA (10/75/10/5) V118 SAIB/PEG400/DMSO/PLGA (10/50/35/5) V119 SAIB/BB/DMSO (60/35/5) V120 SAIB/PEG400/DMSO (46.4/23.0/30.6) V121 SAIB/BB/PEG400/DMSO/PLGA (9.6/38.4/41.2/6.0/4.8) V122 SAIB/BB/PEG400/DMSO (14.7/39.1/42.1/4.1) V123 SAIB/BB/EtOH/PCL (15/78/5/2) V124 SAIB/BB/PEG 400/EtOH (50/25/20/5) V125 SAIB/BB/PEG 400/EtOH (50/33/15/2) V126 SAIB/BB/PEG 400/EtOH (45/35/15/5)

TABLE 6 Pharmaceutical Compositions Comprising SAIB Pharmaceutical Composition Formulations Pharmaceutical Composition (Parts by Weight) C101 SAIB/BA/PLA/SRL (9.7/77.6/9.7/3) C102 SAIB/BA/BB/PLA/SRL (9.7/38.8/38.8/9.7/3) C103 SAIB/BB/EtOH/PLGA/SRL (9.7/67.9/9.7/9.7/3) C104 SAIB/BA/PLGA/SRL (9.7/77.6/9.7/3) C105 SAIB/BA/BB/PLGA (9.7/38.8/38.8/9.7/3) C106 SAIB/BA/PLA/SRL (9.7/67.9/19.4/3) C107 SAIB/NMP/PLA/SRL (9.7/67.9/19.4/3) C108 SAIB/PEG 400/NMP/PLA/SRL (9.7/19.4/48.5/19.4/3) C109 SAIB/PEG 400/BA/PLA/SRL (9.7/19.4/48.5/19.4/3) C110 SAIB/PG/NMP/PLA/SRL (9.7/19.4/48.5/19.4/3) C111 SAIB/PG/BA/PLA/SRL (9.7/19.4/48.5/19.4/3) C112 SAIB/BA/BB/PLA/SRL (9.7/58.2/9.7/19.4/3) C113 SAIB/NMP/BA/PLA/SRL (9.7/38.8/29.1/19.4/3) C114 SAIB/BA/PCL/SRL (9.7/82.4/4.9/3) C115 SAIB/BB/PEG400/EtOH/PLA/SRL(9.7/38.8/41.7/1.9/ 4.9/3) C116 SAIB/BB/EtOH/SRL (48.5/43.6/4.9/3) C117 SAIB/BB/DMSO/PLGA/SRL (9.7/72.7/9.7/4.9/3) C118 SAIB/PEG400/DMSO/PLGA/SRL (9.7/48.5/33.9/4.9/3) C119 SAIB/BB/DMSO/SRL (58.2/33.9/4.9/3) C120 SAIB/PEG400/DMSO/SRL (45/22.3/29.7/3) C121 SAIB/BB/PEG400/DMSO/PLGA/SRL (9.3/37.2/40/5.8/ 4.7/3) C122 SAIB/BB/PEG400/DMSO/SRL (14.3/37.9/40.8/4.0/3) C123 SAIB/BB/EtOH/PCL/SRL (14.5/75.6/4.9/2/3) C124 SAIB/BB/PEG 400/EtOH/SRL (48.5/24.2/19.4/4.9) C125 SAIB/BB/PEG 400/EtOH/SRL (48.5/32/14.6/1.9/3) C126 SAIB/BB/PEG 400/EtOH/SRL (43.6/34/14.5/4.9/3)

TABLE 7 Chemical Stability in Prototype Formulations Pharmaceutical Composition Time, % SRL Remained % SRL Remained Formulations weeks at 5° C. at 25° C. C101 9 — — C102 95.2 90.4 C103 95.8 93.7 C104 95.2 86.8 C105 95.9 90.1 C106 7 94.9 92.5 C107 78.6 15.1 C108 85.9 15.0 C109 95.5 93.9 C110 95.8 63.7 C111 96.4 93.9 C112 97.7 90.9 C113 4 97.1 96.8 C114 95.3 92.0 C115 18 98.3 90.9 C116 2 97.7 97.7 C117 2 98.0 96.0 C118 2 98.0 94.7 C119 2 97.7 98.4 C120 2 — 99.7 C121 1 — 99.6 C122 1 — 99.9 C123 — — —

Example 2

Preparation of Sirolimus Solution Formulations:

Poloxamer 188 was dissolved in mixture of benzyl benzoate and ethanol (weight ratios shown in Table 8) and mixed until uniform. SAIB (at weight ratios shown in Table 8) was added and mixed at 50° C. until a uniform solution was formed. After the solution cooled, triacetin or acetyl triethyl citrate (weight ratios shown in Table 8) was added and mixed thoroughly. Sirolimus at 3 wt % to 4.5 wt % weight was dissolved in each vehicle.

Chemical Stability Testing:

About 2 mL of sirolimus formulations were placed in respective 2 mL crimp sealed glass vials under ambient humidity and stored at 5° C. and 40° C., protected from light exposure.

Example 2 Results:

In Vitro Testing:

Tested formulation compositions are listed in Table 9.

TABLE 8 Composition of Vehicles Containing Poloxamer 188 Vehicle Formulations Composition of Vehicles (Parts by Weight) V201 SAIB/BB/EtOH/Poloxamer 188 (30/64/5/1) V202 SAIB/BB/EtOH/PEG 400/Poloxamer 188 (40/40/5/15/0.2) V203 SAIB/BB/EtOH/Poloxamer 188 (15/79/5/0.2) V204 SAIB/BB/EtOH/Poloxamer 188 (45/49/5/1) V205 SAIB/BB/EtOH/PEG 400/Poloxamer 188 (30/49/5/15/1) V206 SAIB/BB/EtOH/Poloxamer 188 (49/45/5/1) V207 SAIB/BB/EtOH/Acetyl triethyl citrate ATEC/ Poloxamer 188 (1/45/5/48/1) V208 SAIB/BB/EtOH/triacetin/Poloxamer 188 (10/40/5/44/1) V209 SAIB/BB/EtOH/ATEC/Poloxamer 188 (10/40/5/44/1) V210 SAIB/BB/EtOH/ATEC/Poloxamer 188 (40/40/5/14/1) V211 SAIB/BB/EtOH/ATEC/Poloxamer 188 (1/45/5/48/1)

TABLE 9 Composition of Formulations Containing Poloxamer 188 Pharmaceutical Composition Formulations Composition of Formulations (Parts by Weight) C201 SAIB/BB/EtOH/Poloxamer 188/SRL (29.1/62/4.9/1/3) C202 SAIB/BB/EtOH/PEG 400/Poloxamer 188/SRL (38.7/38.7/4.9/14.5/0.2/3) C203 SAIB/BB/EtOH/Poloxamer 188/SRL (14.4/77.5/4.9/0.2/3) C204 SAIB/BB/EtOH/Poloxamer 188/SRL (43.6/47.5/4.9/1/3) C205 SAIB/BB/EtOH/PEG 400/Poloxamer 188/SRL (29.1/47.5/4.9/14.5/1/3) C206 SAIB/BB/EtOH/Poloxamer 188/SRL (47.5/43.6/4.9/1/3) C207 SAIB/BB/EtOH/Acetyl triethyl citrate ATEC/ Poloxamer 188/SRL (1/43.6/4.9/46.5/1/3) C208 SAIB/BB/EtOH/triacetin/Poloxamer 188/SRL (9.7/38.8/4.9/42.7/1/3) C209 SAIB/BB/EtOH/ATEC/Poloxamer 188/SRL (9.7/38.8/4.9/42.7/1/3) C210 SAIB/BB/EtOH/ATEC/Poloxamer 188/SRL (38.8/38.8/4.9/13.6/1/3) C211 SAIB/BB/EtOH/ATEC/Poloxamer 188/SRL (1/43.6/4.9/46.5/1/3)

Table 10 shows the comparison of chemical stability data of formulations with and without Poloxamer.

TABLE 10 Chemical Stability of Sirolimus in Solution Formulations after 2 weeks Pharmaceutical Composition % SRL Remained % SRL Remained Formulations at 5° C. at 40° C. C116 (no Poloxamer 188) 100.3 86.1 C204 (1% Poloxamer 188) 101.0 94.3

Example 3

Viscosity Testing:

Viscosity of the vehicles was measured using Brookfield DVIII+ Programmable Rheometer. Measurements were done using cone and plate with CPE-52 spindle. Viscosities were measured at 25±0.5° C. maintained by Brookfield TC-602D Refrigerated Bath/Programmable Controller.

Chemical Stability Testing

About 2 mL of Sirolimus formulations were placed in respective 2 mL crimp sealed glass vials under ambient humidity and stored at 5° C., 25° C. and 40° C. protected from light exposure.

Preparation of Formulations

1% Poloxamer 188 was dissolved in mixture of benzyl benzoate and ethanol (shown in Table 13) and mixed until uniform. SAIB (at ratios shown in Table 13) was added and mixed at 50° C. until a uniform solution was formed. After cooling of the solution to room temperature, PEG 400 or acetyl tributyl citrate (ratios shown in Table 13) were added and mixed thoroughly. Vitamin E was added and mixed thoroughly. Sirolimus was added at 3% concentration and stirred until all dissolved.

The compositions listed in Table 11 were evaluated for viscosity, chemical stability and sirolimus release (up to 24 hours) in aqueous release medium. These compositions had low viscosities as shown in Table 12.

TABLE 11 Pharmaceutical Composition Formulation Composition of Formulations (Parts by Weight) C301 SAIB/BB/EtOH/PLXM/VE/SRL (46.5/43.6/4.9/1/1/3) C302 SAIB/BB/EtOH/VE/SRL (47.5/43.6/4.9/1/3) C303 SAIB/BB/EtOH/PEG 400/VE/SRL (9.7/38.8/4.9/42.7/1/3) C304 SAIB/BB/EtOH/ATBC/VE/SRL (1/43.6/4.9/46.5/1/3) Further evaluation around Acetyl Tributyl Citrate (ATBC) formulation C304 Effect of SAIB C305 (0, 10%) BB/EtOH/ATBC/VE/SRL (43.6/4.9/47.7/1/3) C306 SAIB/BB/EtOH/ATBC/VE/SRL (9.7/38.8/4.9/44.7/1/3) Effect of PLXM C307 (1%) SAIB/BB/EtOH/ATBC/VE/PLXM/SRL (1/42.7/4.9/46.5/1/1/3) Effect of Vitamin E C308 (0, 10%) SAIB/BB/EtOH/ATBC/SRL (1/43.6/4.9/47.9/3) C309 SAIB/BB/EtOH/ATBC/VE/SRL (1/38.8/4.9/42.7/9.7/3)

TABLE 12 Viscosity, cP Pharmaceutical Shear Vis- Composition Vehicle Composition Rate, cosity, Formulation (Parts by Weight) 1/s cP C301 SAIB/BB/EtOH/PLXM/VE 50 41 (48/45/5/1/1) 362 43 C302 SAIB/BB/EtOH/VE 46 45 (49/45/5/1) 340 46 C303 SAIB/BB/EtOH/PEG 400/VE 80 29 (10/40/5/44/1) 500 29 C304 SAIB/BB/EtOH/ATBC/VE 200 11 (1/45/5/48/1) 500 11 C305 BB/EtOH/ATBC/VE 200 11 (45/5/49/1) 500 12 C306 SAIB/BB/EtOH/ATBC/VE 150 14 (10/40/5/44/1) 500 14 C307 SAIB/BB/EtOH/ATBC/VE/PLXM 156 13 (1/44/5/48/1/1) 500 15 C308 SAIB/BB/EtOH/ATBC 200 11 (1/45/5/49) 500 11 C309 SAIB/BB/EtOH/ATBC/VE 160 14 (1/40/5/44/10) 500 14

Chemical stabilities of sirolimus formulations after 1 and 2 weeks storage at 5° C., 25° C. and 40° C. are listed in Table 13.

TABLE 13 Formulation Vehicle % SRL Composition Composition Temp. Time, Re- Formulation (Parts by Weight) ° C. weeks % SRL mained C301 SAIB/BB/EtOH/ NA T0 3.08 100.0 PLXM/VE/SRL  5 2 3.08 100.0 (46.5/43.6/4.9/1/ 25 2 3.04 98.7 1/3) 40 1 2.92 94.8 2 2.80 90.9 C303 SAIB/BB/EtOH/ NA T0 3.05 100.0 PEG 400/VE/SRL  5 2 3.03 99.3 (9.7/38.8/4.9/ 25 2 3.04 99.7 42.7/1/3) 40 1 3.03 99.3 2 3.05 100.0 C302 SAIB/BB/EtOH/ NA T0 3.08 100.0 VE/SRL  5 2 3.08 100.0 (47.5/43.6/4.9/ 25 2 — — 1/3) 40 1 3.09 100.3 2 3.06 99.4 C304 SAIB/BB/EtOH/ NA T0 3.1 100.0 ATBC/VE/SRL  5 2 3.08 99.4 (1/43.6/4.9/46.5/ 25 2 — — 1/3) 40 1 3.10 100.0 2 3.04 98.1 C305 BB/EtOH/ATBC/ NA T0 3.1 100.0 VE/SRL  5 2 3.1 100.0 (43.6/4.9/47.7/ 25 2 3.07 99.0 1/3) 40 1 3.02 97.4 2 3.01 97.1 C306 SAIB/BB/EtOH/ NA T0 3.08 100.0 ATBC/VE/SRL  5 2 3.07 99.7 (9.7/38.8/4.9/ 25 2 3.05 99.0 44.7/1/3) 40 1 3.03 98.4 2 3.01 97.7 C307 SAIB/BB/EtOH/ NA T0 3.08 100.0 ATBC/VE/PLXM/  5 2 3.1 100.7 SRL 25 2 3.08 100.0 (1/42.7/4.9/46.5/ 40 1 3.05 99.0 1/1/3) 2 3.03 98.4 C308 SAIB/BB/EtOH/ NA T0 3.08 100.0 ATBC/SRL  5 2 3.07 99.7 (1/43.6/4.9/ 25 2 2.85 92.5 47.9/3) 40 1 2.81 91.2 2 2.78 90.3 C309 SAIB/BB/EtOH/ NA T0 3.06 100.0 ATBC/VE/SRL  5 2 3.1 101.3 (1/38.8/4.9/42.7/ 25 2 3.05 99.7 9.7/3) 40 1 3.03 99.0 2 3.01 98.4

A summary of chemical stabilities of sirolimus formulations after 2 weeks storage at 40° C., as well as the % cumulative sirolimus released after 24 hrs in PBS containing 0.1% SDS at 37° C., is listed in Tables 14 and FIG. 3.

TABLE 14a % Cumulative Pharmaceutical Composition of % Recovery Sirolimus Composition Formulations, 2 weeks at Released Formulation (Parts by Weight) 40° C. after 24 hrs C301 SAIB/BB/EtOH/PLXM/ 90.9 15.2 VE/SRL (46.5/43.6/4.9/1/1/3) C303 SAIB/BB/EtOH/ 100.0 22.5* PEG 400/VE/SRL (9.7/38.8/4.9/42.7/1/3) C302 SAIB/BB/EtOH/VE/SRL 99.4 47.7 (47.5/43.6/4.9/1/3) C304 SAIB/BB/EtOH/ATBC/ 98.1 51.6 VE/SRL (1/43.6/4.9/46.5/1/3) *Value may be underestimated due to possible precipitation in depot

TABLE 14b % % Sirolimus Cumulative Recovery Sirolimus 40° C., Released Further Evaluation around ATBC Formulation C304 2 wks after 24 hrs Effect of SAIB C305 BB/EtOH/ATBC/VE/SRL 97.1 39.3 (0, 1%, 10%) (0% SAIB) (43.6/4.9/47.7/1/3) C304 SAIB/BB/EtOH/ATBC/VE/SRL 98.1 51.6 (1% SAIB) (1/43.6/4.9/46.5/1/3) C306 SAIB/BB/EtOH/ATBC/VE/SRL 97.7 43.6 (10% SAIB) (9.7/38.8/4.9/44.7/1/3) Effect of C304 SAIB/BB/EtOH/ATBC/VE/SRL 98.1 51.6 PLXM (1%) (0% PLXM) (1/43.6/4.9/46.5/1/3) C307 SAIB/BB/EtOH/ATBC/VE/PLXM/SRL 98.4 20.4 (1% PLXM) (1/42.7/4.9/46.5/1/1/3) Effect of C308 SAIB/BB/EtOH/ATBC/SRL 90.3 NT Vitamin E (0% Vitamin E) (1/43.6/4.9/47.9/3) (0, 1%, 10%) V304 SAIB/BB/EtOH/ATBC/VE/SRL 98.1 51.6 (1% Vitamin E) (1/43.6/4.9/46.5/1/3) C309 SAIB/BB/EtOH/ATBC/VE/SRL 98.4 NT (10% Vitamin E) (1/38.8/4.9/42.7/9.7/3) VE: Vitamin E NT: Not Tested

As the amount of HVLCM increased, the viscosity of the composition generally increased. For example, as the amount of SAIB increased from 1% to 49%, the viscosity of the composition increased from 11 to 46 cP. The amount of HVLCM, e.g., SAIB, seemed to have no effect on chemical stability of sirolimus. The amount of HVLCM, e.g., SAIB, seemed to have only a slight effect on the initial rate of drug (e.g., sirolimus) release. In the presence of ATBC, SAIB (1-10 wt %) appeared to have little to no effect on chemical stability

Polymer, e.g., poloxamer, appeared to lower the rate of initial in vitro release of drug, e.g., sirolimus. Polymer, e.g., poloxamer at 1 wt %, did not appear to affect viscosity of the composition. In formulations containing ATBC, 1% vitamin E in the presence of 1% poloxamer appeared to have little or no effect on enhancing chemical stability.

Among the chemical stability enhancers evaluated, tocopherol (e.g., vitamin E) appeared to be the most effective enhancer of chemical stability for sirolimus. Tocopherol appeared to enhance the stability of sirolimus in the presence of ATBC, with or without poloxamer. Increasing vitamin E from 1 wt % to 10 wt % did not appear to significantly further enhance chemical stability.

Example 4: In Vivo PK Study

Pharmaceutical compositions having the components and amounts shown in Table 15 were prepared.

Male Japanese White rabbits were systemically anesthetized and thereafter, both eyes were anesthetized on the surface by administering eye drops of oxybuprocaine hydrochloride (0.5%). The rabbits received a single bilateral intravitreal injection of 20 or 30 microliters of formulation. The rabbits were euthanized 1 month, 2 months, 3 months, and 6 months after administration. The enucleated eyes were dissected while frozen and the vitreous humor and retina-choroid were isolated. Amount of sirolimus was determined using liquid chromatography combined with tandem mass spectrometry.

TABLE 15 Test Articles for the First Rabbit PK Study Evaluation Composition of Period Formulation Vehicle Formulations (Sampling (API wt %) Components (Parts by Weight) Dose Timing) C401 (3%) SAIB/BB/EtOH 3 wt % sirolimus 0.6 mg Blood: 2, 24 hrs (50/45/5) 48.5 wt % SAIB (20 μL/eye) 3, 7, 14 days 43.7 wt % BB 1, 2, 3, 4, 5, 4.8 wt % EtOH 6, Months (M) C402 (3%) SAIB/BB/EtOH/ 3 wt % sirolimus 0.6 mg Vitreous/RC PLXM 43.7 wt % SAIB (20 μL/eye) (retina choroid) (45/49/5/1) 47.5 wt % BB 1, 3, 6 M 4.8 wt % EtOH 1 wt % PLXM C403 (3%) SAIB/BB/PEG400/ 3 wt % sirolimus 0.6 mg EtOH/PLXM 29.1 wt % SAIB (20 μL/eye) (30/49/15/5/1) 47.5 wt % BB 14.6 wt % PEG400 4.8 wt % EtOH 1 wt % PLXM C404 (3%) SAIB/BB/PEG400/ 3 wt % sirolimus 0.6 mg EtOH 29.1 wt % SAIB (20 μL/eye) (30/50/15/5) 48.5 wt % BB 14.6 wt % PEG400 4.8 wt % EtOH C405 (3%) SAIB/BB/EtOH 3 wt % sirolimus 0.6 mg Blood: (15/80/5) 14.6 wt % SAIB (20 μL/eye) same timing 77. 6 wt % BB as above 4.8 wt % EtOH Vitreous/RC: C406 (3%) SAIB/BB/EtOH 3 wt % sirolimus 0.6 mg only 3 M (1/94/5) 1 wt % SAIB (20 μL/eye) 91.2 wt % BB 4.8 wt % EtOH C407 (3%) SAIB/BB/EtOH 3 wt % sirolimus 0.9 mg Vitreous/RC: (50/45/5) 48.5 wt % SAIB (30 μL/eye) only 3 M 43.7 wt % BB 4.8 wt % EtOH C407 (3%) SAIB/BB/EtOH 3 wt % sirolimus 0.9 mg Vitreous/RC (50/45/5) 48.5 wt % SAIB (30 μL/eye) (retina 43.7 wt % BB choroid) 4.8 wt % EtOH 1, 3, 6 M

The remaining ratios of sirolimus in the vitreous humors are shown in Table 16 (based on 4-6 eyes). The concentrations of sirolimus in the retina-choroid are shown in Table 17 (based on 3-6 eyes). Remaining amounts are provided as mean±SD.

TABLE 16 Pharmaceutical Concentration Composition of Sirolimus Remaining ratio of Sirolimus (%) Formulation (% W/W) Dose 1 Month 3 Months 6 Months C401 3 0.6 mg/20 μL/eye 70.3 ± 6.8 13.2 ± 2.9 2.8 ± 1.3 C404 3 0.6 mg/20 μL/eye  47.1 ± 11.1  7.7 ± 3.0 0.8 ± 0.3 C403 3 0.6 mg/20 μL/eye 94.4 ± 1.2 59.2 ± 3.9 25.3 ± 13.3 C402 3 0.6 mg/20 μL/eye 105.5 ± 5.0  60.7 ± 6.3 23.2 ± 1.0  C406 3 0.6 mg/20 μL/eye — 14.4 ± 8.1 — C405 3 0.6 mg/20 μL/eye —  2.2 ± 1.8 — C407 3 0.9 mg/30 μL/eye — 10.3 ± 5.4 — C407 3 0.9 mg/30 μL/eye 91.8 ± 3.6 73.3 ± 9.9 30.0 ± 11.1

TABLE 17 Pharmaceutical Concentration Concentration of Sirolimus Composition of Sirolimus in Retina-Choroid (ng/g) Formulation (% W/W) Dose 1 Month 3 Months 6 Months C401 3 0.6 mg/20 μL/eye  248 ± 92.3  156 ± 50.1 551 ± 218 C404 3 0.6 mg/20 μL/eye 414 ± 243  126 ± 93.9  164 ± 69.9 C403 3 0.6 mg/20 μL/eye 281 ± 147 320 ± 255 3421 ± 1980 C402 3 0.6 mg/20 μL/eye 385 ± 157  269 ± 41.4 4846 ± 1957 C406 3 0.6 mg/20 μL/eye — 262 ± 269 — C405 3 0.6 mg/20 μL/eye — 65.5 ± 103  — C407 3 0.9 mg/30 μL/eye — 107 ± 118 — C407 3 0.9 mg/30 μL/eye 896 ± 484 445 ± 113  413 ± 92.4

FIGS. 4 and 5 show data over a 6-month period for the amount of sirolimus remaining in the depots, and the sirolimus concentration in the vitreous humors.

The formulations referred to as C401 and C407 were made with the same components and ratios thereof, on separate occasions. As shown in Tables 16 and 17, and FIGS. 4 and 5, there was variability in the sirolimus release profiles of formulations C401 and C407 having a vehicle consisting of SAIB, BB and EtOH.

Example 5: In Vivo PK Study

Pharmaceutical compositions having the components and amounts shown in Table 18 were prepared.

Male Japanese White rabbits were systemically anesthetized and thereafter, both eyes were anesthetized on the surface by administering eye drops of oxybuprocaine hydrochloride (0.5%). The rabbits received a single bilateral intravitreal injection of 20 or 30 microliters of formulation. The rabbits were euthanized 1 month, 2 months, 3 months and 6 months after administration. The enucleated eyes were dissected while frozen and the vitreous humor and retina-choroid were isolated. Amount of sirolimus was determined using liquid chromatography combined with tandem mass spectrometry.

TABLE 18 Evaluation Composition of Period Formulation Vehicle Formulations (sampling (API wt %) Component (Parts by Weight) Dose Objective timing) C501 SAIB/BB/EtOH/ 3 wt % sirolimus 0.9 evaluate the Blood: (3 wt %) ATEC/PLXM/VE 1 wt % SAIB mg/eye effect of 2, 24 hrs (1/45/5/47/1/1) 43.6 wt % BB 30 μL poloxamer 3, 7, 14 days 4.8 wt % EtOH (PLXM) and 1, 2, 3, 6 M 45.6 wt % ATEC vitamin E Vitreous/RC: 1 wt % PLXM (VE) 1, 3, 6 M 1 wt % VE C502 SAIB/BB/EtOH/ 3 wt % sirolimus 0.9 evaluate the (3 wt %) ATEC/PLXM 38.8 wt % SAIB mg/eye effect of (40/40/5/14/1) 38.8 wt % BB 30 μL PLXM 4.8 wt % EtOH 13.6 wt % ATEC 1 wt % PLXM C503 SAIB/BB/EtOH/ 4.5 wt % sirolimus 1.35 evaluate the (4.5 wt %) ATEC/PLXM 1 wt % SAIB mg/eye effect of (1/45/5/48/1) 43 wt % BB 30 μL PLXM and 4.7 wt % EtOH low SAIB 45.8 wt % ATEC 1 wt % PLXM C504 SAIB/BB/EtOH/ 4.5 wt % sirolimus 1.35 evaluate the (4.5 wt %) ATEC/VE 1 wt % SAIB mg/eye effect of VE (1/45/5/48/1) 43 wt % BB 30 μL and low 4.7 wt % EtOH SAIB 45.8 wt % ATEC 1 wt % VE C505 SAIB/BB/EtOH/ 3 wt % sirolimus 0.9 control (3 wt %) PLXM 43.7 wt % SAIB mg/eye (45/49/5/1) 47.5 wt % BB 30 μL 4.8 wt % EtOH 1 wt % PLXM C506 PEG400/EtOH 2 wt % sirolimus 0.44 control Blood: (2 wt %) (95/5) 93.1 wt % PEG mg/eye 2, 24 hrs 4.9 wt % EtOH 20 μL 3, 7, 14 days 1, 2 M Vitreous/RC: 1, 2 M

Table 19 shows the remaining ratio of sirolimus in the intra-vitreous depots. Table 20 shows the concentration of sirolimus in retina/choroid. Amounts are expressed as mean±SD (based on 2-4 eyes).

TABLE 19 Pharmaceutical Concentration Composition of Sirolimus Remaining Ratio of Sirolimus (%) Formulation (% W/W) Dose 1 Month 2 Months 3 Months 6 Months C505 3  0.9 mg/30 μL/eye 82.4 ± 1.4 — 72.7 ± 4.3 33.8 C501 3  0.9 mg/30 μL/eye 83.3 ± 2.8 — 61.4 ± 4.1 55.3 C502 3  0.9 mg/30 μL/eye  65.3 ± 34.9 — 58.1 ± 2.7 31.3 ± 3.6  C503 4.5 1.35 mg/30 μL/eye 64.6 ± 6.0 —  58.8 ± 18.3 23.0 ± 11.3 C504 4.5 1.35 mg/30 μL/eye 61.9 ± 6.8 — 63.8 ± 2.6 56.2 ± 15.2 C506 2 0.44 mg/20 μL/eye  18.5 ± 13.2 9.3 ± 6.0 — —

TABLE 20 Pharmaceutical Concentration Composition of Sirolimus Concentration of Sirolimus (ng/g) Formulation (% W/W) Dose 1 Month 2 Months 3 Months 6 Months C505 3  0.9 mg/30 μL/eye 406 ± 338 — 549 ± 381 201 C501 3  0.9 mg/30 μL/eye 406 ± 386 — 536 ± 460 284 C502 3  0.9 mg/30 μL/eye 302 ± 183 — 507 ± 238 609 ± 733 C503 4.5 1.35 mg/30 μL/eye 1839 ± 531  — 617 ± 415 126 ± 102 C504 4.5 1.35 mg/30 μL/eye 754 ± 662 — 341 ± 109 1060 ± 928  C506 2 0.44 mg/20 μL/eye 719 ± 359 644 ± 505 — —

FIGS. 6 and 7 show data over a 6-month period for the amount of sirolimus remaining in the depots, and the sirolimus concentration in the vitreous humors.

Blood levels of sirolimus were measured at 30-day intervals. The results are shown in FIG. 8.

Example 6: In Vivo PK Study

Solvents used are as follows: SAIB and acetyl tributyl citrate (such as commercially available from Sigma-Aldrich), benzyl benzoate and ethanol (99.5) (such as commercially available from Nacalai Tesque, Inc.), vitamin E (such as commercially available from Riken Vitamin).

Sirolimus is commercially available from a number of sources, including Santen Pharmaceutical Company.

Preparation of Sirolimus Solution Formulations:

In a standard bottle, 240 mg of sirolimus were measured, and dissolved by adding 4.4 mL of pre-mixed SD/BB/EtOH (10/40/5, v/v/v), 3.6 mL of premixed BB/EtOH (40/5, v/v), or 3.68 mL of pre-mixed VitE/BB/EtOH (1/40/5, v/v/v). Then 3.6 mL, 4.4 mL, or 4.32 mL of acetyl tributyl citrate was added and mixed, respectively, thereby preparing the formulation of SD/BB/EtOH/ATBC (10/40/5/45, v/v/v/v), BB/EtOH/ATBC (40/5/55, v/v/v), or VitE/BB/EtOH/ATBC (1/40/5/54, v/v/v/v). A control composition comprising EtOH/PEG400/SRL (4/92/4, w/w/w) was also prepared. Compositions and doses are shown in Table 21.

TABLE 21 Concentration of each component Pharmaceutical Composition of based on weight of Composition Vehicles (Parts the composition Formulation by Weight) (wt %) Dose C601 EtOH/PEG400 4 wt % sirolimus 0.88 mg/20 (4/92) 4 wt % EtOH μL/eye 92 wt % PEG400 C602 SD*/BB/EtOH/ 2.7 wt % sirolimus 0.9 mg/30 ATBC 10.4 wt % SAIB* μL/eye (10/40/5/45) 40.6 wt % BB 3.6 wt % EtOH 42.8 wt % ATBC C603 BB/EtOH/ 2.7 wt % sirolimus 0.9 mg/30 ATBC 40.9 wt % BB μL/eye (40/5/55) 3.6 wt % EtOH 52.8 wt % ATBC C604 VitE/BB/EtOH/ 2.7 wt % sirolimus 0.9 mg/30 ATBC 40.9 wt % BB μL/eye (1/40/5/54) 3.6 wt % EtOH 51.9 wt % ATBC 0.9 wt % Vitamin E *SD: SAIB reagent grade

Rabbit PK Study Following Intravitreal Injection of Sirolimus Solution Formulations:

Male Japanese white rabbits were systemically anesthetized and thereafter, both eyes were anesthetized on the surface by administering eye drops of oxybuprocaine hydrochloride (0.5%). The rabbits received a single bilateral intravitreal injection of 30 microliters of test formulation or 20 microliters of 4% sirolimus in PEG400/EtOH (94/2). The rabbits were euthanized 4 weeks and 12 weeks after administration. The enucleated eyes were dissected while frozen and the vitreous humor was isolated. Amount of sirolimus in vitreous body was determined using liquid chromatography combined with tandem mass spectrometry.

Table 22 shows the remaining amounts of dose in the intra-vitreous depots.

TABLE 22 Pharmaceutical Composition Remaining (% of dose amount) Formulation Dose 4 weeks 12 weeks C601 0.88 mg/20 μL/eye  40.3 ± 19.9 BLQ C602 0.9 mg/30 μL/eye 59.4 ± 8.4   25.5 ± 12.3 C603 0.9 mg/30 μL/eye 71.1 ± 14.4 29.4 ± 3.8 C604 0.9 mg/30 μL/eye 83.7 ± 7.7  73.8 ± 4.3 Mean ± SD (3-4 eyes) BLQ: Below the lower limit of quantification

FIG. 9 shows data over a 12-week period for the amount of sirolimus remaining in the depots. Because the depot cannot be separately removed from the vitreous humor, the amount of sirolimus remaining in the depots is assumed in the present disclosure to be equivalent to the amount of sirolimus in the combined vitreous humor and depot.

Example 7: Pharmaceutical Compositions

Compositions are prepared as in Tables 23a and 23b. Amounts of excipients are expressed as parts by weight. The pharmaceutical compositions contain sirolimus in a concentration of 3 mg/mL.

TABLE 23a C701 C702 C703 C704 C705 C706 C707 C708 C709 SRL 3 3 3 3 3 3 3 3 3 SAIB 1 0 1 48  45  1 10  1 48  BB 45  45  45  45  49  45  40  45  45  EtOH 5 5 5 5 5 5 5 5 5 PLXM 1 1 — 1 1 1 — — 1 PEG400 — — — — — — 44  48  — VE 1 1 1 1 1 1 1 1 1 ATEC 47  48  48  — — — — — — TEC — — — — — 47  — — —

TABLE 23b C710 C711 C712 C713 C714 C715 SRL 3 3 3 3 3 3 SAIB 1 10 10 1 49 1 BB 45 40 40 44.5 45 45 EtOH 5 5 5 5 5 5 PLXM 1 1 1 0.5 VE 1 1 1 1 1 1 ATBC 48 TEC 47 Lauroglycol 90 — 43 Ceraphyl 30 — 43 Labrafac PG 48

Example 8

Sustained Releasability Evaluation Test:

The drug sustained releasability in an animal of the depot formulation of the present disclosure was evaluated.

Preparation of Test Articles:

In standard bottles, 240 mg of sirolimus was weighed, and after being dissolved by adding 0.8 mL of dimethyl sulfoxide, 7.2 mL of acetyl triethyl citrate and mixing, followed by performing filtration sterilization with a filter of 0.20 μm pore size, thereby preparing the formulations of comparative composition C801.

In standard bottles, 240 mg of sirolimus was weighed, and after being dissolved by adding 3.6 mL of benzyl benzoate/ethanol (40:5 by volume ratio) or 3.68 mL of vitamin E/benzyl benzoate/ethanol (1:40:5 by volume ratio) that were mixed in advance, 4.4 mL or 4.32 mL of acetyl tri-n-butyl citrate was added and mixed, followed by performing filtration sterilization with a filter of 0.20 μm pore size, thereby preparing the formulations C802 and C803.

Rabbit Pharmacokinetics Evaluation:

Using a Hamilton syringe equipped with a 30 G needle, 0.03 mL of the depot formulations of C801 (comparative), C802, and C803 per eye of albino rabbit was intravitreally administered. After four weeks and after twelve weeks from administration, euthanization was conducted with anesthetic by intravenous administration of pentobarbital sodium, and the eyeballs were enucleated. The enucleated eyeballs were immediately frozen, and the vitreous bodies collected in a state containing the depot formulation. The sirolimus concentration in the vitreous body at each time point of collection was measured using a LC-MS/MS, and the drug residual amount after administration was evaluated.

Test Results and Considerations:

The test results are shown in Table 24.

TABLE 24 Formula C801 C802 C803 sirolimus 240 mg 240 mg 240 mg Acetyl tri-n-butyl citrate — 4.4 mL 4.32 mL Acetyl triethyl citrate 7.2 mL — — Benzyl benzoate — 3.2 mL 3.2 mL Dimethylsulfoxide 0.8 mL Ethanol — 0.4 mL 0.4 mL Vitamin E — — 0.08 mL Residual rate of After 4 10.0 71.1 83.7 sirolimus (%) weeks After 12  0.2 29.4 73.8 weeks

As shown in Table 24, only 10.0% of the administered amount of sirolimus remained at four weeks after administration for comparative formulation C801; whereas, 71.1% of the administered amount for formulation C802 remained, and 83.7% of the administered amount for formulation C803 remained.

According to the above results, it was confirmed that the sustained-releasability is improved by the present depot formulation.

Example 9: Pharmaceutical Compositions and In Vivo PK Study

Compositions were prepared as in Table 25. Amounts of excipients are expressed as parts by weight. The pharmaceutical compositions contained sirolimus in a concentration of 30 mg/g.

TABLE 25 C901 C902 C903 C904 C905 SRL 3 3 3 3 3 SAIB 1 0 1 46.5 43.7 BB 43.6 43.7 43.7 43.7 47.5 EtOH 4.8 4.8 4.8 4.8 4.8 PLXM 1 1 — 1 1 VE 1 1 1 1 — ATEC 45.6 46.5 46.5 — —

Rabbit PK Study Following Intravitreal Injection of Sirolimus Solution Formulations:

Male Japanese white rabbits were systemically anesthetized and thereafter, both eyes were anesthetized on the surface by administering eye drops of oxybuprocaine hydrochloride (0.5%). The rabbits received a single bilateral intravitreal injection of 30 microliters of test formulation. The rabbits were euthanized 4 weeks and 12 weeks after administration. The enucleated eyes were dissected while frozen and the vitreous humor was isolated. Amount of sirolimus in vitreous body was determined using liquid chromatography combined with tandem mass spectrometry.

Table 26 shows the remaining amounts of dose in the intra-vitreous depots. FIG. 10 shows data over a 6-month period involving formulations C901 to C905 for the amount of sirolimus remaining in the depots. As noted above, the amount of sirolimus remaining in the depots is assumed in the present disclosure to be equivalent to the amount of sirolimus in the combined vitreous humor and depot.

TABLE 26 (remaining ratios of sirolimus in the vitreous humors) Setting Dose Pharmaceutical Concentration (Setting value:ad- Remaining ratio of sirolimus to Composition of sirolimus ministered amount initial administered sirolimus (%) Formulation (% W/W) of sirolimus) 1 Month 3 Months 6 Months C901 3 0.9 mg/30 μL/eye 88.8 ± 6.4 65.8 ± 8.9 26.9 ± 5.9 C902 3 0.9 mg/30 μL/eye  88.2 ± 10.6 73.1 ± 7.5 21.2 ± 9.6 C903 3 0.9 mg/30 μL/eye 93.3 ± 5.6 79.3  54.8 ± 19.8 C904 3 0.9 mg/30 μL/eye 107.2 ± 3.9   92.0 ± 15.7 38.6 ± 2.1 C905 3 0.9 mg/30 μL/eye 114.4 ± 6.4  94.8 ± 9.1 34.2 ± 1.3

Table 27 and FIG. 11 show data over a 6-month period involving formulations C901 to C905 for the sirolimus concentration in the retina-choroid.

TABLE 27 (concentrations of sirolimus in the retina-choroid) Pharmaceutical Concentration Composition of Sirolimus Concentration of sirolimus (ng/g) Formulation (% W/W) Dose 1 Month 3 Months 6 Months C901 3 0.9 mg/30 μL/eye 1033 ± 421  1721 ± 1360  273 ± 52.0 C902 3 0.9 mg/30 μL/eye 1418 ± 975  1424 ± 1612 486 ± 424 C903 3 0.9 mg/30 μL/eye 3339 ± 3016 804 772 ± 851 C904 3 0.9 mg/30 μL/eye 510 ± 185 1130 ± 414  456 ± 154 C905 3 0.9 mg/30 μL/eye 584 ± 381 1280 ± 930  513 ± 421

Blood levels of sirolimus were measured at 30-day intervals for formulations C901 to C905. The results are shown in FIG. 12.

Example 10: Pharmaceutical Compositions and In Vivo PK Study

Compositions were prepared as in Table 28. Amounts of excipients are expressed as parts by weight. The pharmaceutical compositions contained sirolimus in a concentration of 30 mg/g.

TABLE 28 C906 C907 C908 C909 SRL 3 3 3 3 SAIB 1 9.7 1 46.5 BB 43.7 38.8 43.7 43.7 EtOH 4.8 4.8 4.8 4.8 PLXM 1 — — 1 PEG400 — 42.7 46.5 — VE 1 1 1 1 TEC 45.6 — — —

Rabbit PK Study Following Intravitreal Injection of Sirolimus Solution Formulations:

Male Japanese white rabbits were systemically anesthetized and thereafter, both eyes were anesthetized on the surface by administering eye drops of oxybuprocaine hydrochloride (0.5%). The rabbits received a single bilateral intravitreal injection of 30 microliters of test formulation. The rabbits were euthanized 4 weeks and 12 weeks after administration. The enucleated eyes were dissected while frozen and the vitreous humor was isolated. Amount of sirolimus in vitreous body was determined using liquid chromatography combined with tandem mass spectrometry.

Table 29 shows the remaining amounts of dose in the intra-vitreous depots. FIG. 13 shows data over a 6-month period involving formulations C906 to C909 for the amount of sirolimus remaining in the depots. As noted above, the amount of sirolimus remaining in the depots is assumed in the present disclosure to be equivalent to the amount of sirolimus in the combined vitreous humor and depot.

TABLE 29 (remaining ratios of sirolimus in the vitreous humors) Setting Dose Pharmaceutical Concentration (Setting value:ad- Remaining Ratio of Sirolimus to Composition of Sirolimus ministered amount Initial Administered Sirolimus (%) Formulation (% W/W) of sirolimus) 1 Month 3 Months 6 Months C906 3 0.9 mg/30 μL/eye 82.8 ± 9.9 67.7 ± 12.0 30.0 ± 30.7 C907 3 0.9 mg/30 μL/eye 92.8 ± 5.5 74.1 ± 9.8  26.0 ± 7.0  C908 3 0.9 mg/30 μL/eye 94.4 ± 8.4 75.8 ± 21.9 25.9 ± 14.0 C909 3 0.9 mg/30 μL/eye 95.7 ± 1.6 82.2 ± 18.3 37.9 ± 2.8 

Table 30 and FIG. 14 show data over a 6-month period involving formulations C906 to C909 for the sirolimus concentration in the retina-choroid.

TABLE 30 (concentrations of sirolimus in the retina-choroid) Pharmaceutical Concentration Composition of Sirolimus Concentration of Sirolimus (ng/g) Formulation (% W/W) Dose 1 M 3 M 6 M C906 3 0.9 mg/30 μL/eye 1614 ± 1406  708 ± 1008 905 ± 616 C907 3 0.9 mg/30 μL/eye 905 ± 679 417 ± 237 442 ± 244 C908 3 0.9 mg/30 μL/eye 1080 ± 334  466 ± 227 261 ± 229 C909 3 0.9 mg/30 μL/eye 1381 ± 639  467 ± 331 444 ± 281

Blood levels of sirolimus were measured at 30-day intervals for formulations C906 to C909. The results are shown in FIG. 15.

Example 11: Pharmaceutical Compositions and In Vivo PK Study

Compositions were prepared as in Table 31. Amounts of excipients are expressed as parts by weight. The pharmaceutical compositions contained sirolimus in a concentration of 30 mg/g.

TABLE 31 C907 C908 C914 C915 C909 SRL 3 3 3 3 3 SAIB 9.7 1 47.5 1 46.5 BB 38.8 43.7 43.7 43.7 43.7 EtOH 4.8 4.8 4.8 4.8 4.8 PLXM — — — — 1 PEG400 42.7 46.5 — — — VE 1 1 1 1 1 ATBC — — — 46.5 —

Rabbit PK Study Following Intravitreal Injection of Sirolimus Solution Formulations:

Male Japanese white rabbits were systemically anesthetized and thereafter, both eyes were anesthetized on the surface by administering eye drops of oxybuprocaine hydrochloride (0.5%). The rabbits received a single bilateral intravitreal injection of 30 microliters of test formulation. The rabbits were euthanized 4 weeks and 12 weeks after administration. The enucleated eyes were dissected while frozen and the vitreous humor was isolated. Amount of sirolimus in vitreous body was determined using liquid chromatography combined with tandem mass spectrometry.

Table 32 and FIG. 16 show data over a 6-month period involving formulations C907 to C909, C914, and C915 for the amount of sirolimus remaining in the vitreous humor.

TABLE 32 (remaining ratios of sirolimus in the vitreous humors) Setting Dose Pharmaceutical Concentration (Setting value:ad- Remaining Ratio of Sirolimus to Composition of Sirolimus ministered amount Initial Administered Sirolimus (%) Formulation (% W/W) of sirolimus) 1 Month 3 Months 6 Months C907 3 0.9 mg/30 μL/eye 82.8 ± 3.0 56.3 24.5 ± 7.6 C908 3 0.9 mg/30 μL/eye 86.9 ± 1.8  63.4 ± 18.0 34.4 ± 5.3 C914 3 0.9 mg/30 μL/eye 91.4 ± 2.8 72.1 ± 4.9 31.6 ± 5.2 C915 3 0.9 mg/30 μL/eye  82.7 ± 14.3 73.7 ± 6.0  36.3 ± 24.6 C909 3 0.9 mg/30 μL/eye 94.2 ± 2.3 76.8 ± 2.5 32.8 ± 4.0

Table 33 and FIG. 17 show data over a 6-month period involving formulations C907 to C909, C914, and C915 for the sirolimus concentration in the retina-choroid.

TABLE 33 (concentrations of sirolimus in the retina-choroid) Pharmaceutical Concentration Composition of Sirolimus Concentration of Sirolimus (ng/g) Formulation (% W/W) Dose 1 Month 3 Months 6 Months C907 3 0.9 mg/30 μL/eye 780 ± 889 709 196 ± 97.5 C908 3 0.9 mg/30 μL/eye 263 ± 198  441 ± 73.7 276 ± 55.1 C914 3 0.9 mg/30 μL/eye 1693 ± 1653 1015 ± 411  420 ± 590  C915 3 0.9 mg/30 μL/eye 2877 ± 2668 769 ± 160 393 C909 3 0.9 mg/30 μL/eye 974 ± 343 744 ± 270 164 ± 40.0

Blood levels of sirolimus were measured at 30-day intervals for formulations C907 to C909, C914, and C915. The results are shown in FIG. 18.

Example 12: Pharmaceutical Compositions and In Vivo PK Study

The composition was prepared as in Table 34. Amounts of excipients are expressed as parts by weight. The pharmaceutical compositions contained sirolimus in a concentration of 30 mg/g.

TABLE 34 C914 SRL 3 SAIB 47.5 BB 43.7 EtOH 4.8 VE 1

Rabbit PK Study Following Intravitreal Injection of Sirolimus Solution Formulations:

Male Japanese white rabbits were systemically anesthetized and thereafter, both eyes were anesthetized on the surface by administering eye drops of oxybuprocaine hydrochloride (0.5%). The rabbits received a single bilateral intravitreal injection of 30 microliters of test formulation. The rabbits were euthanized 4 weeks and 12 weeks after administration. The enucleated eyes were dissected while frozen and the vitreous humor was isolated. Amount of sirolimus in vitreous body was determined using liquid chromatography combined with tandem mass spectrometry.

Table 35 and FIG. 19 show data over a 6-month period involving formulation C914 for the amount of sirolimus remaining in the vitreous humor.

TABLE 35 (remaining ratios of sirolimus in the vitreous humors) Setting Dose Remaining Ratio (Setting of Pharma- Con- value: Sirolimus to Initial ceutical centration administered Administered Sirolimus Composition of Sirolimus amount of (%) Formulation (% W/W) sirolimus) 1 M 3 M 6 M C914 3 0.9 mg/ 124.2 74.8 ± 1.1 31.7 ± 1.5 30 μL/eye

Table 36 and FIG. 20 show data over a 6-month period involving formulation C914 for the sirolimus concentration in the retina-choroid.

TABLE 36 (concentrations of sirolimus in the retina-choroid) Pharmaceutical Concentration Composition of Sirolimus Concentration of Sirolimus (ng/g) Formulation (% W/W) Dose 1 Month 3 Months 6 Months C914 3 0.9 mg/30 μL/eye 705 1135 ± 573 554 ± 189 Blood levels of sirolimus were measured at 30-day intervals for formulation C914. The results are shown in FIG. 21.

Example 13

Compositions are listed in Table 37. Amounts of excipients are expressed as parts by weight. The pharmaceutical compositions contained sirolimus in concentration between 10 to 35 mg/g.

Preparation of Test Articles:

Benzyl benzoate, ethanol and acetyl tri-n-butyl citrate were weighed in a bottle and mixed well. Vitamin E was added and mixed. Sirolimus at concentrations listed in Table 37 was added, solution was stirred until all dissolved. The resulting solutions were sterile filtered using 0.2 μm pore size sterile filters.

TABLE 37 Formulation C1001 C1002 C1003 C1004 C1005 C1006 SRL 3 3 3 3 3.5 1 BB 38.8 39.7 35 81.5 38.6 39.6 EtOH 4.8 4.8 4.8 4.8 4.8 4.9 Acetyl 52.4 52.4 52.4 9.7 52.1 53.5 tri-n-butyl citrate VE 1 0.1 4.8 1 1 1

Rabbit PK Study Following Intravitreal Injection of Sirolimus Solution Formulations:

Male Japanese white rabbits were systemically anesthetized and thereafter, both eyes were anesthetized on the surface by administering eye drops of oxybuprocaine hydrochloride (0.4%). The rabbits received a single bilateral intravitreal injection of 30 or 50 microliters of test formulation. The blood was collected via the auricular artery. The rabbits were euthanized 4 weeks after administration. The enucleated eyes were dissected while frozen and the vitreous humor and retina-choroid were isolated. Amounts of sirolimus in vitreous humor, retina-choroid and whole blood were determined using liquid chromatography combined with tandem mass spectrometry.

Table 38 shows data over a 6-month period involving formulations C1001 to C1006 for the amount of sirolimus remaining in the vitreous humor.

TABLE 38 (remaining ratios of sirolimus in the vitreous humors) Pharmaceutical Concentration Remaining Ratio of Sirolimus to Initial Composition of Sirolimus Administered Sirolimus (%) Formulation (% W/W) Dose 1 M 3 M 6 M C1001 3 0.9 mg/30 μL/eye 79.1 ± 9.6 67.3 ± 12.4 49.7 ± 12.3 C1002 3 0.9 mg/30 μL/eye 78.9 ± 10.8 73.6 ± 21.6 70.1 ± 33.2 C1003 3 0.9 mg/30 μL/eye 73.6 ± 7.9 75.4 ± 13.9 31.4 ± 12.0 C1005 3.5 1.05 mg/30 μL/eye 82.4 ± 9.4 63.6 ± 9.1 43.5 ± 8.0 C1006 1 0.3 mg/30 μL/eye 78.4 ± 8.5 80.3 ± 6.7 46.4 ± 6.1 C1001 3 0.9 mg/30 μL/eye 83.4 ± 3.2 78.5 ± 13.5 60.1 C1001 3 1.5 mg/50 μL/eye 90.5 ± 10.0 91.0 ± 13.0 54.0 ± 15.0 C1004 3 0.9 mg/30 μL/eye 88.3 ± 30.3 84.3 ± 25.4 42.0 ± 20.0

Table 39 shows data over a 6-month period involving formulations C1001 to C1006 for the sirolimus concentration in the retina-choroid.

TABLE 39 (concentrations of sirolimus in the retina-choroid) Pharmaceutical Concentration Composition of Sirolimus Concentration of Sirolimus (μg/g) Formulation (% W/W) Dose 1 M 3 M 6 M C1001 3 0.9 mg/30 μL/eye 0.792 ± 0.979 1.92 0.958 ± 0.900 C1002 3 0.9 mg/30 μL/eye 1.42 2.11 ± 2.15  1.14 ± 0.402 C1003 3 0.9 mg/30 μL/eye 3.77 ± 2.89 3.05 ± 2.19 1.99 ± 1.43 C1005 3.5 1.05 mg/30 μL/eye 1.54 ± 1.74  1.54 ± 0.414 1.31 ± 1.47 C1006 1 0.3 mg/30 μL/eye 1.88 ± 1.55 0.325 ± 0.263 0.558 ± 0.465 C1001 3 0.9 mg/30 μL/eye 2.33 ± 1.47 2.75 0.419 C1001 3 1.5 mg/50 μL/eye 2.52 ± 1.70 2.84 ± 2.50 1.48 ± 1.83 C1004 3 0.9 mg/30 μL/eye 6.16 4.37 ± 4.87 0.783 ± 0.964

Blood levels of sirolimus were measured for formulations C1001 to C1006. The results are shown in Table 40.

TABLE 40 (sirolimus concentration in whole blood (ng/mL)) Concentration of sirolimus Concentration of sirolimus (ng/mL) Formulation (% W/W) Dose 0.083 day 1 day 3 day 7 day 14 day C1001 3 0.9 mg/30 μL/eye 0.487 ± 0.083 0.905 ± 0.597 0.437 ± 0.488 0.366 ± 0.185 0.228 ± 0.052 C1002 3 0.9 mg/30 μL/eye 0.713 ± 0.292 1.18 ± 0.70 0.491 ± 0.077 0.423 ± 0.150 0.231 ± 0.237 C1003 3 0.9 mg/30 μL/eye 0.731 ± 0.430 0.910 ± 0.432 0.691 ± 0.281 0.391 ± 0.201 0.383 ± 0.210 C1005 3.5 1.05 mg/30 μL/eye  0.873 ± 0.248 0.994 ± 0.856 0.526 ± 0.273 0.402 ± 0.161 0.461 ± 0.137 C1006 1 0.3 mg/30 μL/eye 0.367 ± 0.314 0.491 ± 0.186 0.239 ± 0.067 0.271 ± 0.057 0.168 ± 0.031 C1001 3 0.9 mg/30 μL/eye 0.991 ± 0.107 1.10 ± 0.02 0.541 ± 0.116 0.539 ± 0.046 0.403 ± 0.047^(a) C1001 3 1.5 mg/50 μL/eye 0.933 ± 0.652 2.60 ± 0.46 1.19 ± 0.14 0.964 ± 0.483 0.658 ± 0.404^(a) C1004 3 0.9 mg/30 μL/eye 1.02 ± 0.25 2.02 ± 0.37 0.689 ± 0.308 0.520 ± 0.145 0.321 ± 0.067^(a) Concentration of sirolimus Concentration of sirolimus (ng/mL) Formulation (% W/W) Dose 28 day 57 day 91 day 119 day 147 day 182 day C1001 3 0.9 mg/30 μL/eye 0.389 ± 0.191 0.752 ± 0.129 0.598 ± 0.265 0.555 0.480 0.551 C1002 3 0.9 mg/30 μL/eye 0.456 ± 0.157 0.680 ± 0.440 0.437 ± 0.245 0.650 0.463 0.416 C1003 3 0.9 mg/30 μL/eye 0.548 ± 0.151 0.728 ± 0.224 0.276 ± 0.220 0.739 0.481 0.381 C1005 3.5 1.05 mg/30 μL/eye  0.530 ± 0.136 0.776 ± 0.332 0.536 ± 0.263 0.656 0.380 0.257 C1006 1 0.3 mg/30 μL/eye 0.142 ± 0.096 0.255 ± 0.084 0.198 ± 0.039 0.257 0.195 0.202 C1001 3 0.9 mg/30 μL/eye 0.563 ± 0.098 0.799 ± 0.101^(b) 0.460 ± 0.101 0.480^(c) 0.366 0.305 C1001 3 1.5 mg/50 μL/eye 0.760 ± 0.339  1.02 ± 0.58^(b) 0.677 ± 0.347 0.768^(c) 0.599 0.683 C1004 3 0.9 mg/30 μL/eye 0.389 ± 0.102 0.559 ± 0.024^(b) 0.869 ± 0.351 1.31^(c) 1.05 1.65 ^(a)15 day ^(b)56 day ^(c)122 day

Example 14: Pharmaceutical Compositions

Compositions are prepared as in Table 41. Amounts of excipients are expressed as parts by weight. The pharmaceutical compositions contain sirolimus in a concentration of 30 mg/g.

TABLE 41 C1101 C1102 C1103 SRL 3 3 3 SAIB 9.7 9.7 1 BB 38.8 38.8 43.2 EtOH 4.8 4.8 4.8 PLXM 1 1 0.5 VE 1 1 1 Lauroglycol 90 41.7 — — Ceraphyl 30 — 41.7 — Labrafac PG — — 46.5

Example 15: SAIB/Vitamin E Mixtures

Preparation of SAIB/Vitamin E Mixtures:

SAIB was dissolved in vitamin E (at weight ratios shown in Table 42), and the mixture was mixed until uniform.

Density Testing:

About 2 mL of the mixture was injected into a density meter to measure the density of the mixture at 25° C.

As shown in Table 42, the density increased depending on the weight ratio of SAIB:vitamin E. In addition, there was linear correlation of weight ratio of SAIB:vitamin E and density at 25° C. as shown in FIG. 22. According to the linear approximation equation, Density (at 25° C.)=0.0016×(Weight ratio of SAIB:vitamin E)+0.9445, the weight ratio of SAIB:vitamin E is about 34.7% when the density is 1. Therefore, the mixture can float in water when the weight ratio of SAIB:vitamin E is below about 34.7%.

Vitreous humor has a density slightly higher than water (about 1.0053 g/mL), and is generally at body temperature (37° C.) rather than 25° C. The present depot formulations including SAIB and vitamin E are injected into vitreous humor and release API and the other excipients. At the end of release time, the depot consists mainly of SAIB, vitamin E and API, because almost all of the other excipients have been released. If the weight ratio of SAIB:vitamin E is below about 38% in the depot formulation, the depot may float in the vitreous humor, causing discomfort to patients.

TABLE 42 Weight ratio of Weight ratio Mixture SAIB:vitamin of vitamin Total Density at 25° C. Sample No. E (%) E:SAIB (%) (%) (g/cm²) 1 0 100 100 0.9462 2 10 90 100 0.9588 3 25 75 100 0.9859 4 40 60 100 1.0049 5 50 50 100 1.0283

Example 16: Fluocinolone Acetonide Formulations

Compositions listed in Table 43 were prepared by adding 3% w/w fluocinolone to the vehicles. Resulting formulations were solutions with some excess solid. Amounts of excipients in Table 43 are expressed as parts by weight.

TABLE 43 Formulations of Fluocinolone Acetonide in Vehicles C1721 C1722 C1723 Fluocinolone 3 3 3 SAIB 48 1 10 BB 45 45 40 EtOH 5 5 5 PLXM 1 1 — PEG400 — — 44 VE 1 1 1 TEC — 47 —

In Vitro Release Testing of Fluocinolone Formulations:

50 μL formulations were injected into 5 mL release medium (PBS containing 0.2% SDS, equilibrated at 37° C.) using 1 mL EXEL syringe with 23 G needle. Samples were placed on an orbital shaker rotating at 50 rpm at 37° C. At each time point 4.5 mL media was pulled and replaced by fresh 4.5 mL. Care was taken not to touch the drug depot during sampling. Samples were analyzed by HPLC to determine concentration of fluocinolone. Samples were prepared in triplicates. Release profiles of fluocinolone formulations are shown in FIG. 23.

Example 17: Triamcinolone Formulations

Compositions listed in Table 44 were prepared by adding 3% w/w triamcinolone to the vehicles. Resulting formulations were solutions with some excess solid. Amounts of excipients in Table 44 are expressed as parts by weight.

TABLE 44 Formulations of Triamcinolone in Vehicles C1724 C1725 C1726 Triamcinolone 3 3 3 SAIB 48 1 10 BB 45 45 40 EtOH 5 5 5 PLXM 1 1 — PEG400 — — 44 VE 1 1 1 TEC — 47 —

In Vitro Release Testing of Triamcinolone Formulations:

50 μL formulations were injected into 5 mL release medium (PBS containing 0.2% SDS, equilibrated at 37° C.) using 1 mL EXEL syringe with 23 G needle. Samples were placed on an orbital shaker rotating at 50 rpm at 37° C. At each time point 4.5 mL media was pulled and replaced by fresh 4.5 mL. Care was taken not to touch the drug depot during sampling. Samples were analyzed by HPLC to determine concentration of triamcinolone Samples were prepared in triplicates. Release profiles of triamcinolone formulations are shown in FIG. 24.

Example 18: Ibuprofen Formulations

Compositions listed in Table 45 were prepared by adding 3% w/w ibuprofen to the vehicles. Resulting formulations were clear solutions. Amounts of excipients in Table 45 are expressed as parts by weight.

TABLE 45 Formulations of Ibuprofen in Vehicles C1727 C1728 C1729 Ibuprofen 3 3 3 SAIB 48 1 10 BB 45 45 40 EtOH 5 5 5 PLXM 1 1 — PEG400 — — 44 VE 1 1 1 TEC — 47 —

In Vitro Release Testing of Ibuprofen Formulations:

50 μL formulations were injected into 5 mL release medium (PBS containing 0.2% SDS, equilibrated at 37° C.) using 1 mL EXEL syringe with 23 G needle. Samples were placed on an orbital shaker rotating at 50 rpm at 37° C. At each time point 4.5 mL media was pulled and replaced by fresh 4.5 mL. Care was taken not to touch the drug depot during sampling. Samples were analyzed by HPLC to determine concentration of ibuprofen. Samples were prepared in triplicates. Release profile of ibuprofen formulations is shown in FIG. 25.

Example 19: Pharmaceutical Compositions

Compositions were prepared as shown in Tables 46 and 47. Amounts of components of the vehicles are expressed as parts by weight per 100 parts of the compositions. All compositions in Tables 46 and 47 have sirolimus concentrations of 30 mg/g.

TABLE 46 C1701 C1702 C1703 C1704 C1705 C1706 C1707 C1708 C1709 C1710 SRL 3 3 3 3 3 3 3 3 3 3 SAIB 1 2 3 4 4.9 5.9 6.8 7.8 8.8 9.7 BB 43.7 42.7 41.7 40.7 39.8 38.8 37.9 36.9 35.9 35 PEG400 46.5 46.5 46.5 46.5 46.5 46.5 46.5 46.5 46.5 46.5 EtOH 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 VE 1 1 1 1 1 1 1 1 1 1

TABLE 47 C1711 C1712 C1713 C1714 C1715 C1716 C1717 C1718 C1719 C1720 SRL 3 3 3 3 3 3 3 3 3 3 SAIB 1 2 2.9 3.9 4.9 5.8 6.8 7.8 8.7 9.7 BB 90.2 89.2 88.3 87.3 86.3 85.4 84.4 83.4 82.5 81.5 EtOH 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 VE 1 1 1 1 1 1 1 1 1 1

Example 20: Pharmaceutical Compositions and In Vivo PK Study

Compositions were prepared as in Table 48. Amounts of components of the vehicles are expressed as parts by weight per 100 parts of the compositions. All compositions in Tables 48 have sirolimus concentrations of 30 mg/g.

TABLE 48 C1701 C1711 SRL 3 3 SAIB 1 1 BB 43.7 90.2 PEG 46.5 0 EtOH 4.8 4.8 VE 1 1

Male Japanese white rabbits were general anesthetized by intravenous injection of pentobarbital sodium, and thereafter, eye drops of oxybuprocaine hydrochloride (0.4%) were administered topically to both eyes for surface anesthesia. The rabbits received a single bilateral intravitreal injection of 10 or 30 microliters of test formulation. The blood was collected via the auricular artery. The rabbits were euthanized 1 month after administration. The enucleated eyes were dissected while frozen and the vitreous humor and retina-choroid were isolated. Sirolimus in vitreous humor, retina-choroid and whole blood were quantified using liquid chromatography combined with tandem mass spectrometry.

Table 49 and FIG. 26 show data over a 1-month period involving formulations C1701 and C1711 for the amount of sirolimus remaining in the vitreous humor.

TABLE 49 (remaining ratios of sirolimus in the vitreous humors) Setting Dose Remaining Ratio (Setting value: of Sirolimus Pharmaceutical Concentration administered after 1 M to Composition of Sirolimus amount of Initial Administered Formulation (% W/W) sirolimus) Sirolimus (%) C1701 3 0.9 mg/30 μL/eye 75.3 ± 3.4 C1701 3 0.3 mg/10 μL/eye 84.1 ± 3.8 C1711 3 0.9 mg/30 μL/eye 77.8 ± 6.3 C1711 3 0.3 mg/10 μL/eye 78.4 ± 4.1

Table 50 shows data over a 1-month period involving formulations C1701 and C1711 for the sirolimus concentration in the retina-choroid.

TABLE 50 (concentration of sirolimus in the retina-choroid) Setting Dose Concentration (Setting value: of Pharmaceutical Concentration administered Sirolimus in the Composition of Sirolimus amount of Retina-Choroid at Formulation (% W/W) sirolimus) 1 M (ng/g) C1701 3 0.9 mg/eye/30 μL 1302 ± 1527 C1701 3 0.3 mg/eye/10 μL  334 ± 7689 C1711 3 0.9 mg/eye/30 μL 9996 ± 1527 C1711 3 0.3 mg/eye/10 μL 665 ± 178

Blood levels of sirolimus were measured over 30 days for formulations C1701 and C1711. The results are shown in FIG. 27.

Example 21: Pharmaceutical Compositions and In Vivo PK Study

Compositions were prepared as in Table 51. Amounts of components of the vehicles are expressed as parts by weight per 100 parts of the compositions.

TABLE 51 C2101 C2102 C2103 C2104 C2105 C2106 C2107 C2108 C2109 C2110 SRL 3 3 1 0.30 3 3 1 0.3 0.2 2 SAIB 1 1 1 1 1 1 1 1 — — BB 44.5 44.6 44.6 44.9 91.1 91.2 92.1 92.7 — — PEG 46.6 46.6 47.5 47.9 — — — — 95.8 94 EtOH 4.9 4.9 5 5 4.9 4.9 5 5 4 4 VE 0.2 0.03 1 1 0.2 0.03 1 1 — —

Male Japanese white rabbits were general anesthetized by intravenous injection of pentobarbital sodium, and thereafter, eye drops of oxybuprocaine hydrochloride (0.4%) were administered topically to both eyes for surface anesthesia. The rabbits received a single bilateral intravitreal injection of 10 or 30 microliters of formulations C2101-2108 or 20 microliters of formulations C2109 and C2110. The blood was collected via the auricular artery. The rabbits were euthanized 1 month after administration. The enucleated eyes were dissected while frozen and the vitreous humor and retina-choroid were isolated. Sirolimus in vitreous humor, retina-choroid and whole blood were quantified using liquid chromatography combined with tandem mass spectrometry.

Table 52 and FIG. 28 show data over a 1-month period involving formulations listed in Table 51 for the amount of sirolimus remaining in the vitreous humor.

TABLE 52 (remaining ratios of sirolimus in the vitreous humors) Remaining Ratio of Setting Dose Sirolimus after Pharmaceutical Concentration (Setting value: 1 M to Initial Composition of Sirolimus administered amount Administered Formulation (% W/W) of sirolimus) Sirolimus (%) C2101 3 0.9 mg/30 μL/eye 92.4 ± 7.4 C2102 3 0.9 mg/30 μL/eye 92.0 ± 12.3 C2103 1 0.3 mg/30 μL/eye 66.3 C2104 0.3 0.09 mg/30 μL/eye 80.5 ± 3.2 C2105 3 0.9 mg/30 μL/eye 90.5 ± 9.1 C2106 3 0.9 mg/30 μL/eye 91.4 ± 22.9 C2107 1 0.3 mg/30 μL/eye 86.9 C2108 0.3 0.09 mg/30 μL/eye 99.2 ± 5.2 C2109 0.2 0.044 mg/20 μL/eye ND C2110 2 0.44 mg/20 μL/eye 27.6 ± 17.1 ND: below detection limit

Table 53 shows data over a 1-month period involving formulations listed in Table 51 for the sirolimus concentration in the retina-choroid.

TABLE 53 (concentration of sirolimus in the retina-choroid) Setting Dose (Setting value: Concentration of Pharmaceutical Concentration administered Sirolimus in the Composition of Sirolimus amount of Retina-Choroid Formulation (% W/W) sirolimus) (ng/g) C2101 3 0.9 mg/eye/30 μL 1464 ± 1075 C2102 3 0.9 mg/eye/30 μL 2083 ± 2462 C2103 1 0.3 mg/eye/30 μL 3442 C2104 0.3 0.09 mg/eye/30 μL 162 ± 83  C2105 3 0.9 mg/eye/30 μL 505 ± 277 C2106 3 0.9 mg/eye/30 μL 713 ± 453 C2107 1 0.3 mg/eye/30 μL 1568 C2108 0.3 0.09 mg/eye/30 μL 608 ± 581 C2109 0.2 0.044 mg/eye/20 μL ND C2110 2 0.44 mg/eye/20 μL 2964 ± 1652 ND: below detection limit

Blood levels of sirolimus were measured at 30-day intervals for the formulations listed in Table 51. The results are shown in FIG. 29.

Example 22: Stability of Sirolimus in Water

The compositions were prepared as in Table 54. Amounts of excipients are expressed as parts by weight. The pharmaceutical compositions contained sirolimus in a concentration of 30 mg/g.

TABLE 54 C2201 C2202 C2203 C2204 C2205 C2206 C2207 C2208 SRL 3 3 3 3 3 3 3 3 SAIB 1 1 1 1 1 1 1 1 BB 43.7 43.7 43.7 43.7 43.7 43.7 43.7 43.7 PEG 46.5 46.7 46.9 47.1 47.3 47.5 47.5 47.5 EtOH 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 VE 1 0.8 0.6 0.4 0.2 0 0.02 0.002

30 microliters of these compositions were injected in 4 mL water filled in a glass vial. The samples were stored at 37° C. and 60° C., and taken with time. Specifically, 1 mL water was taken as a water sample from the samples after storage. In addition, 7 mL acetonitrile was added into the remaining 3 mL water and depot to dissolve the depot in the sample and adjust the volume to 10 mL. About 1 mL sample that depot was dissolved was taken as a mixture sample. Amounts of sirolimus in these samples were determined using liquid chromatography, and the amount of sirolimus in the depot was determined on the basis of the amount in the water sample and the mixture sample.

Table 55 and FIG. 30 show the amount of sirolimus remaining after storage at 60° C.

TABLE 55 Remaining of Sirolimus at 60° C. (%) Formulation No. C2201 C2202 C2203 C2204 C2205 C2207 C2208 C2206 Time (day) 0 100 100 100 100 100 100 100 100 7 96.0 97.1 96.1 96.2 95.2 97.2 93.0 2.3 14 88.0 88.0 89.3 89.6 89.9 93.1 14.6 0.0 28 75.2 77.0 75.6 77.9 77.4 80.8 ND ND ND: below detection limit

Table 56 and FIG. 31 show the amount of sirolimus remaining after storage at 37° C.

TABLE 56 Remaining of Sirolimus at 37° C. (%) Formulation No. C2201 C2202 C2203 C2204 C2205 C2207 C2208 C2206 Time (day) 0 100 100 100 100 100 100 100 100 7 100.0 103.0 102.2 101.2 101.7 99.4 98.5 93.3 30 97.9 96.5 98.6 96.7 95.6 88.4 89.9 3.6 90 101.9 98.3 99.0 99.7 93.6 97.7 98.0 0.0

All of the compositions (pharmaceutical and vehicle) disclosed in the preceding Examples and taught throughout this disclosure may be used in pre-clinical and/or clinical studies, including in vitro studies, animal studies, and/or clinical studies, any of which may be directed to, e.g. properties (e.g., drug release rate), pharmacokinetics, pharmacodynamics, toxicology, safety, and/or efficacy. The compositions may be therapeutically used in humans (clinical use) or in animals (veterinary use), in humans or animals in need of such therapy. 

The invention claimed is:
 1. A composition comprising: sirolimus present in an amount ranging from about 1 wt % to about 5 wt %, based on weight of the composition; sucrose acetate isobutyrate (SAIB) present in an amount ranging from about 0.5 wt % to about 5 wt %, based on weight of the composition; benzyl benzoate present in an amount ranging from about 35 wt % to about 50 wt %, based on weight of the composition; ethanol present in an amount ranging from about 1 wt % to about 10 wt %, based on weight of the composition; polyethylene glycol (PEG) present in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition; and vitamin E in an amount ranging from about 0.01 wt % to about 5 wt % wherein when the composition is administered intra-ocularly as a single dose to a rabbit, a median amount of sirolimus released from the composition at 6 months after administration ranges from 30% to 100% of a total amount of the sirolimus in the composition at the time of administration.
 2. The composition of claim 1, wherein the vitamin E is present in an amount ranging from about 0.5 wt % to about 2 wt %, based on weight of the composition.
 3. The composition of claim 1, wherein the benzyl benzoate is present in an amount ranging from about 35 wt % to about 45 wt %, based on weight of the composition.
 4. The composition of claim 1, wherein the composition has a weight ratio of SAIB:vitamin E ranging from about 0.5 to about
 10. 5. The composition of claim 1, wherein the benzyl benzoate is present in an amount ranging from about 40 wt % to about 50 wt %, based on weight of the composition.
 6. The composition of claim 1, wherein the ethanol is present in an amount ranging from about 1 wt % to about 7 wt %, based on weight of the composition.
 7. The composition of claim 1, wherein the ethanol is present in an amount ranging from about 3 wt % to about 10 wt %, based on weight of the composition.
 8. The composition of claim 1, wherein at least 98% of the sirolimus in the composition remains after storage in a 2 mL crimp sealed glass vial for 18 weeks at 5° C./60% RH.
 9. The composition of claim 1, wherein at least 90% of the sirolimus in the composition remains after storage in a 2 mL crimp sealed glass vial for 18 weeks at 25° C./60% RH.
 10. The composition of claim 1, wherein a weight ratio of SAIB to vitamin E ranges from about 60:1 to about 1:2.
 11. The composition of claim 1, wherein a weight ratio of SAIB to vitamin E ranges from about 10:1 to about 1:1.8.
 12. The composition of claim 1, wherein a weight ratio of SAIB to vitamin E ranges from about 5:1 to about 1:1.5.
 13. The composition of claim 1, wherein a weight ratio of SAIB to vitamin E ranges from about 2:1 to about 1:1.5.
 14. The composition of claim 1, wherein the composition has a density at 25° C. and 1 atmosphere ranging from 1.02 g/mL to 1.15 g/mL.
 15. The composition of claim 1, wherein the composition has a viscosity ranging from about 1 cP to about 150 cP at 25° C. and 1 atmosphere.
 16. The composition of claim 1, wherein the composition has a viscosity ranging from about 5 cP to about 50 cP at 25° C. and 1 atmosphere.
 17. The composition of claim 1, wherein the composition has a viscosity ranging from about 10 cP to about 30 cP at 25° C. and 1 atmosphere.
 18. The composition of claim 1, wherein the vitamin E is present in an amount ranging from about 0.1 wt % to about 5 wt %, based on weight of the composition.
 19. The composition of claim 1, wherein the vitamin E is present in an amount ranging from about 0.02 wt % to about 0.09 wt %, based on weight of the composition. 